justmoon
13 years ago
committed by
Pieter Wuille
8 changed files with 1106 additions and 33 deletions
@ -0,0 +1,182 @@
@@ -0,0 +1,182 @@
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// LevelDB Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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//
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// See port_example.h for documentation for the following types/functions.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright
|
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
|
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// notice, this list of conditions and the following disclaimer in the
|
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the University of California, Berkeley nor the
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// names of its contributors may be used to endorse or promote products
|
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// derived from this software without specific prior written permission.
|
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//
|
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// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
|
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
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// DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
|
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#include "port/port_win.h" |
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#include <windows.h> |
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#include <cassert> |
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namespace leveldb { |
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namespace port { |
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Mutex::Mutex() : |
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mutex_(::CreateMutex(NULL, FALSE, NULL)) { |
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assert(mutex_); |
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} |
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Mutex::~Mutex() { |
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assert(mutex_); |
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::CloseHandle(mutex_); |
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} |
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void Mutex::Lock() { |
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assert(mutex_); |
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::WaitForSingleObject(mutex_, INFINITE); |
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} |
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void Mutex::Unlock() { |
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assert(mutex_); |
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::ReleaseMutex(mutex_); |
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} |
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void Mutex::AssertHeld() { |
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assert(mutex_); |
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assert(1); |
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} |
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CondVar::CondVar(Mutex* mu) : |
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waiting_(0), |
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mu_(mu), |
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sema_(::CreateSemaphore(NULL, 0, 0x7fffffff, NULL)), |
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event_(::CreateEvent(NULL, FALSE, FALSE, NULL)), |
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broadcasted_(false){ |
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assert(mu_); |
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} |
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CondVar::~CondVar() { |
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::CloseHandle(sema_); |
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::CloseHandle(event_); |
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} |
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void CondVar::Wait() { |
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wait_mtx_.Lock(); |
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++waiting_; |
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assert(waiting_ > 0); |
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wait_mtx_.Unlock(); |
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::SignalObjectAndWait(mu_->mutex_, sema_, INFINITE, FALSE); |
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wait_mtx_.Lock(); |
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bool last = broadcasted_ && (--waiting_ == 0); |
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assert(waiting_ >= 0); |
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wait_mtx_.Unlock(); |
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// we leave this function with the mutex held
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if (last) |
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{ |
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::SignalObjectAndWait(event_, mu_->mutex_, INFINITE, FALSE); |
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} |
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else |
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{ |
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::WaitForSingleObject(mu_->mutex_, INFINITE); |
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} |
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} |
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void CondVar::Signal() { |
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wait_mtx_.Lock(); |
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bool waiters = waiting_ > 0; |
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wait_mtx_.Unlock(); |
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if (waiters) |
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{ |
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::ReleaseSemaphore(sema_, 1, 0); |
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} |
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} |
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void CondVar::SignalAll() { |
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wait_mtx_.Lock(); |
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broadcasted_ = (waiting_ > 0); |
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if (broadcasted_) |
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{ |
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// release all
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::ReleaseSemaphore(sema_, waiting_, 0); |
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wait_mtx_.Unlock(); |
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::WaitForSingleObject(event_, INFINITE); |
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broadcasted_ = false; |
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} |
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else |
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{ |
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wait_mtx_.Unlock(); |
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} |
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} |
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AtomicPointer::AtomicPointer(void* v) { |
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Release_Store(v); |
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} |
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void* AtomicPointer::Acquire_Load() const { |
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void * p = nullptr; |
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InterlockedExchangePointer(&p, rep_); |
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return p; |
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} |
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void AtomicPointer::Release_Store(void* v) { |
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InterlockedExchangePointer(&rep_, v); |
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} |
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void* AtomicPointer::NoBarrier_Load() const { |
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return rep_; |
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} |
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void AtomicPointer::NoBarrier_Store(void* v) { |
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rep_ = v; |
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} |
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enum InitializationState |
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{ |
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Uninitialized = 0, |
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Running = 1, |
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Initialized = 2 |
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}; |
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void InitOnce(OnceType* once, void (*initializer)()) { |
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static_assert(Uninitialized == LEVELDB_ONCE_INIT, "Invalid uninitialized state value"); |
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InitializationState state = static_cast<InitializationState>(InterlockedCompareExchange(once, Running, Uninitialized)); |
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if (state == Uninitialized) { |
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initializer(); |
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*once = Initialized; |
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} |
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if (state == Running) { |
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while(*once != Initialized) { |
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Sleep(0); // yield
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} |
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} |
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assert(*once == Initialized); |
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} |
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} |
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} |
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@ -0,0 +1,161 @@
@@ -0,0 +1,161 @@
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// LevelDB Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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//
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// See port_example.h for documentation for the following types/functions.
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|
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright
|
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// notice, this list of conditions and the following disclaimer.
|
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// * Redistributions in binary form must reproduce the above copyright
|
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// notice, this list of conditions and the following disclaimer in the
|
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// documentation and/or other materials provided with the distribution.
|
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// * Neither the name of the University of California, Berkeley nor the
|
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// names of its contributors may be used to endorse or promote products
|
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// derived from this software without specific prior written permission.
|
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//
|
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// THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
|
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
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// DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
|
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#ifndef STORAGE_LEVELDB_PORT_PORT_WIN_H_ |
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#define STORAGE_LEVELDB_PORT_PORT_WIN_H_ |
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#ifdef _MSC_VER |
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#define snprintf _snprintf |
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#define close _close |
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#define fread_unlocked _fread_nolock |
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#endif |
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#ifdef SNAPPY |
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#include <snappy/snappy.h> |
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#endif |
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#include <string> |
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#include <stdint.h> |
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namespace leveldb { |
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namespace port { |
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// Windows is little endian (for now :p)
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static const bool kLittleEndian = true; |
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class CondVar; |
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class Mutex { |
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public: |
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Mutex(); |
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~Mutex(); |
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void Lock(); |
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void Unlock(); |
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void AssertHeld(); |
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private: |
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friend class CondVar; |
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// critical sections are more efficient than mutexes
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// but they are not recursive and can only be used to synchronize threads within the same process
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// additionnaly they cannot be used with SignalObjectAndWait that we use for CondVar
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// we use opaque void * to avoid including windows.h in port_win.h
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void * mutex_; |
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// No copying
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Mutex(const Mutex&); |
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void operator=(const Mutex&); |
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}; |
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// the Win32 API offers a dependable condition variable mechanism, but only starting with
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// Windows 2008 and Vista
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// no matter what we will implement our own condition variable with a semaphore
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// implementation as described in a paper written by Douglas C. Schmidt and Irfan Pyarali
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class CondVar { |
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public: |
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explicit CondVar(Mutex* mu); |
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~CondVar(); |
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void Wait(); |
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void Signal(); |
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void SignalAll(); |
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private: |
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Mutex* mu_; |
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Mutex wait_mtx_; |
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long waiting_; |
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void * sema_; |
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void * event_; |
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bool broadcasted_; |
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}; |
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// Storage for a lock-free pointer
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class AtomicPointer { |
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private: |
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void * rep_; |
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public: |
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AtomicPointer() : rep_(nullptr) { } |
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explicit AtomicPointer(void* v); |
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void* Acquire_Load() const; |
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void Release_Store(void* v); |
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void* NoBarrier_Load() const; |
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void NoBarrier_Store(void* v); |
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}; |
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typedef volatile long OnceType; |
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#define LEVELDB_ONCE_INIT (0) |
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extern void InitOnce(OnceType* once, void (*initializer)()); |
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inline bool Snappy_Compress(const char* input, size_t length, |
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::std::string* output) { |
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#ifdef SNAPPY |
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output->resize(snappy::MaxCompressedLength(length)); |
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size_t outlen; |
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snappy::RawCompress(input, length, &(*output)[0], &outlen); |
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output->resize(outlen); |
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return true; |
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#endif |
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return false; |
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} |
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inline bool Snappy_GetUncompressedLength(const char* input, size_t length, |
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size_t* result) { |
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#ifdef SNAPPY |
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return snappy::GetUncompressedLength(input, length, result); |
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#else |
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return false; |
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#endif |
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} |
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inline bool Snappy_Uncompress(const char* input, size_t length, |
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char* output) { |
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#ifdef SNAPPY |
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return snappy::RawUncompress(input, length, output); |
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#else |
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return false; |
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#endif |
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} |
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inline bool GetHeapProfile(void (*func)(void*, const char*, int), void* arg) { |
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return false; |
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} |
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} |
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} |
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#endif // STORAGE_LEVELDB_PORT_PORT_WIN_H_
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@ -0,0 +1,591 @@
@@ -0,0 +1,591 @@
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include <deque> |
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#ifdef LEVELDB_PLATFORM_WINDOWS |
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#include <windows.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <sys/stat.h> |
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#include <sys/types.h> |
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#include <time.h> |
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#include <io.h> |
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#else |
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#include <dirent.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <pthread.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <sys/mman.h> |
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#include <sys/stat.h> |
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#include <sys/time.h> |
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#include <sys/types.h> |
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#include <sys/param.h> |
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#include <time.h> |
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#include <unistd.h> |
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#endif |
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#if defined(LEVELDB_PLATFORM_ANDROID) |
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#include <sys/stat.h> |
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#endif |
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#include "leveldb/env.h" |
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#include "leveldb/slice.h" |
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#ifdef LEVELDB_PLATFORM_WINDOWS |
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#include "util/win_logger.h" |
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#else |
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#include "util/posix_logger.h" |
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#endif |
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#include "port/port.h" |
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#include "util/logging.h" |
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#ifdef __linux |
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#include <sys/sysinfo.h> |
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#include <linux/unistd.h> |
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#endif |
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#include <fstream> |
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// Boost includes - see WINDOWS file to see which modules to install
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#include <boost/date_time/gregorian/gregorian.hpp> |
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#include <boost/date_time/posix_time/posix_time.hpp> |
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#include <boost/filesystem/convenience.hpp> |
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#include <boost/thread/once.hpp> |
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#include <boost/thread/thread.hpp> |
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#include <boost/bind.hpp> |
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#include <boost/scoped_ptr.hpp> |
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#include <boost/interprocess/sync/file_lock.hpp> |
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#include <boost/thread/condition_variable.hpp> |
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namespace leveldb { |
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namespace { |
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// returns the ID of the current process
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static boost::uint32_t current_process_id(void) { |
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#ifdef _WIN32 |
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return static_cast<boost::uint32_t>(::GetCurrentProcessId()); |
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#else |
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return static_cast<boost::uint32_t>(::getpid()); |
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#endif |
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} |
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// returns the ID of the current thread
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static boost::uint32_t current_thread_id(void) { |
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#ifdef _WIN32 |
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return static_cast<boost::uint32_t>(::GetCurrentThreadId()); |
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#else |
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#ifdef __linux |
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return static_cast<boost::uint32_t>(::syscall(__NR_gettid)); |
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#else |
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// just return the pid
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return current_process_id(); |
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#endif |
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#endif |
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} |
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static char global_read_only_buf[0x8000]; |
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class PosixSequentialFile: public SequentialFile { |
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private: |
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std::string filename_; |
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FILE* file_; |
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public: |
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PosixSequentialFile(const std::string& fname, FILE* f) |
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: filename_(fname), file_(f) { } |
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virtual ~PosixSequentialFile() { fclose(file_); } |
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|
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virtual Status Read(size_t n, Slice* result, char* scratch) { |
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Status s; |
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#if defined(BSD) || defined(__MINGW32__) |
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// fread_unlocked doesn't exist on FreeBSD or MingW
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size_t r = fread(scratch, 1, n, file_); |
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#else |
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size_t r = fread_unlocked(scratch, 1, n, file_); |
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#endif |
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*result = Slice(scratch, r); |
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if (r < n) { |
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if (feof(file_)) { |
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// We leave status as ok if we hit the end of the file
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} else { |
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// A partial read with an error: return a non-ok status
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s = Status::IOError(filename_, strerror(errno)); |
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} |
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} |
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return s; |
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} |
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|
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virtual Status Skip(uint64_t n) { |
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if (fseek(file_, n, SEEK_CUR)) { |
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return Status::IOError(filename_, strerror(errno)); |
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} |
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return Status::OK(); |
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} |
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}; |
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|
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class PosixRandomAccessFile: public RandomAccessFile { |
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private: |
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std::string filename_; |
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int fd_; |
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mutable boost::mutex mu_; |
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|
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public: |
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PosixRandomAccessFile(const std::string& fname, int fd) |
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: filename_(fname), fd_(fd) { } |
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virtual ~PosixRandomAccessFile() { close(fd_); } |
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|
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virtual Status Read(uint64_t offset, size_t n, Slice* result, |
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char* scratch) const { |
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Status s; |
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#ifdef LEVELDB_PLATFORM_WINDOWS |
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// no pread on Windows so we emulate it with a mutex
|
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boost::unique_lock<boost::mutex> lock(mu_); |
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|
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if (::_lseeki64(fd_, offset, SEEK_SET) == -1L) { |
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return Status::IOError(filename_, strerror(errno)); |
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} |
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|
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int r = ::_read(fd_, scratch, n); |
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*result = Slice(scratch, (r < 0) ? 0 : r); |
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lock.unlock(); |
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#else |
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ssize_t r = pread(fd_, scratch, n, static_cast<off_t>(offset)); |
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*result = Slice(scratch, (r < 0) ? 0 : r); |
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#endif |
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if (r < 0) { |
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// An error: return a non-ok status
|
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s = Status::IOError(filename_, strerror(errno)); |
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} |
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return s; |
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} |
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}; |
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|
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// We preallocate up to an extra megabyte and use memcpy to append new
|
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// data to the file. This is safe since we either properly close the
|
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// file before reading from it, or for log files, the reading code
|
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// knows enough to skip zero suffixes.
|
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|
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class BoostFile : public WritableFile { |
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|
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public: |
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explicit BoostFile(std::string path) : path_(path), written_(0) { |
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Open(); |
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} |
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|
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virtual ~BoostFile() { |
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Close(); |
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} |
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|
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private: |
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void Open() { |
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// we truncate the file as implemented in env_posix
|
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file_.open(path_.generic_string().c_str(), |
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std::ios_base::trunc | std::ios_base::out | std::ios_base::binary); |
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written_ = 0; |
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} |
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|
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public: |
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virtual Status Append(const Slice& data) { |
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Status result; |
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file_.write(data.data(), data.size()); |
||||
if (!file_.good()) { |
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result = Status::IOError( |
||||
path_.generic_string() + " Append", "cannot write"); |
||||
} |
||||
return result; |
||||
} |
||||
|
||||
virtual Status Close() { |
||||
Status result; |
||||
|
||||
try { |
||||
if (file_.is_open()) { |
||||
Sync(); |
||||
file_.close(); |
||||
} |
||||
} catch (const std::exception & e) { |
||||
result = Status::IOError(path_.generic_string() + " close", e.what()); |
||||
} |
||||
|
||||
return result; |
||||
} |
||||
|
||||
virtual Status Flush() { |
||||
file_.flush(); |
||||
return Status::OK(); |
||||
} |
||||
|
||||
virtual Status Sync() { |
||||
Status result; |
||||
try { |
||||
Flush(); |
||||
} catch (const std::exception & e) { |
||||
result = Status::IOError(path_.string() + " sync", e.what()); |
||||
} |
||||
|
||||
return result; |
||||
} |
||||
|
||||
private: |
||||
boost::filesystem::path path_; |
||||
boost::uint64_t written_; |
||||
std::ofstream file_; |
||||
}; |
||||
|
||||
|
||||
|
||||
class BoostFileLock : public FileLock { |
||||
public: |
||||
boost::interprocess::file_lock fl_; |
||||
}; |
||||
|
||||
class PosixEnv : public Env { |
||||
public: |
||||
PosixEnv(); |
||||
virtual ~PosixEnv() { |
||||
fprintf(stderr, "Destroying Env::Default()\n"); |
||||
exit(1); |
||||
} |
||||
|
||||
virtual Status NewSequentialFile(const std::string& fname, |
||||
SequentialFile** result) { |
||||
FILE* f = fopen(fname.c_str(), "rb"); |
||||
if (f == NULL) { |
||||
*result = NULL; |
||||
return Status::IOError(fname, strerror(errno)); |
||||
} else { |
||||
*result = new PosixSequentialFile(fname, f); |
||||
return Status::OK(); |
||||
} |
||||
} |
||||
|
||||
virtual Status NewRandomAccessFile(const std::string& fname, |
||||
RandomAccessFile** result) { |
||||
#ifdef LEVELDB_PLATFORM_WINDOWS |
||||
int fd = _open(fname.c_str(), _O_RDONLY | _O_RANDOM | _O_BINARY); |
||||
#else |
||||
int fd = open(fname.c_str(), O_RDONLY); |
||||
#endif |
||||
if (fd < 0) { |
||||
*result = NULL; |
||||
return Status::IOError(fname, strerror(errno)); |
||||
} |
||||
*result = new PosixRandomAccessFile(fname, fd); |
||||
return Status::OK(); |
||||
} |
||||
|
||||
virtual Status NewWritableFile(const std::string& fname, |
||||
WritableFile** result) { |
||||
Status s; |
||||
try { |
||||
// will create a new empty file to write to
|
||||
*result = new BoostFile(fname); |
||||
} |
||||
catch (const std::exception & e) { |
||||
s = Status::IOError(fname, e.what()); |
||||
} |
||||
|
||||
return s; |
||||
} |
||||
|
||||
virtual bool FileExists(const std::string& fname) { |
||||
return boost::filesystem::exists(fname); |
||||
} |
||||
|
||||
virtual Status GetChildren(const std::string& dir, |
||||
std::vector<std::string>* result) { |
||||
result->clear(); |
||||
|
||||
boost::system::error_code ec; |
||||
boost::filesystem::directory_iterator current(dir, ec); |
||||
if (ec != 0) { |
||||
return Status::IOError(dir, ec.message()); |
||||
} |
||||
|
||||
boost::filesystem::directory_iterator end; |
||||
|
||||
for(; current != end; ++current) { |
||||
result->push_back(current->path().filename().generic_string()); |
||||
} |
||||
|
||||
return Status::OK(); |
||||
} |
||||
|
||||
virtual Status DeleteFile(const std::string& fname) { |
||||
boost::system::error_code ec; |
||||
|
||||
boost::filesystem::remove(fname, ec); |
||||
|
||||
Status result; |
||||
|
||||
if (ec != 0) { |
||||
result = Status::IOError(fname, ec.message()); |
||||
} |
||||
|
||||
return result; |
||||
} |
||||
|
||||
virtual Status CreateDir(const std::string& name) { |
||||
Status result; |
||||
|
||||
if (boost::filesystem::exists(name) && |
||||
boost::filesystem::is_directory(name)) { |
||||
return result; |
||||
} |
||||
|
||||
boost::system::error_code ec; |
||||
|
||||
if (!boost::filesystem::create_directories(name, ec)) { |
||||
result = Status::IOError(name, ec.message()); |
||||
} |
||||
|
||||
return result; |
||||
}; |
||||
|
||||
virtual Status DeleteDir(const std::string& name) { |
||||
Status result; |
||||
|
||||
boost::system::error_code ec; |
||||
if (!boost::filesystem::remove_all(name, ec)) { |
||||
result = Status::IOError(name, ec.message()); |
||||
} |
||||
|
||||
return result; |
||||
}; |
||||
|
||||
virtual Status GetFileSize(const std::string& fname, uint64_t* size) { |
||||
boost::system::error_code ec; |
||||
|
||||
Status result; |
||||
|
||||
*size = static_cast<uint64_t>(boost::filesystem::file_size(fname, ec)); |
||||
if (ec != 0) { |
||||
*size = 0; |
||||
result = Status::IOError(fname, ec.message()); |
||||
} |
||||
|
||||
return result; |
||||
} |
||||
|
||||
virtual Status RenameFile(const std::string& src, const std::string& target) { |
||||
boost::system::error_code ec; |
||||
|
||||
boost::filesystem::rename(src, target, ec); |
||||
|
||||
Status result; |
||||
|
||||
if (ec != 0) { |
||||
result = Status::IOError(src, ec.message()); |
||||
} |
||||
|
||||
return result; |
||||
} |
||||
|
||||
virtual Status LockFile(const std::string& fname, FileLock** lock) { |
||||
*lock = NULL; |
||||
|
||||
Status result; |
||||
|
||||
try { |
||||
if (!boost::filesystem::exists(fname)) { |
||||
std::ofstream of(fname.c_str(), std::ios_base::trunc | std::ios_base::out); |
||||
} |
||||
|
||||
assert(boost::filesystem::exists(fname)); |
||||
|
||||
boost::interprocess::file_lock fl(fname.c_str()); |
||||
BoostFileLock * my_lock = new BoostFileLock(); |
||||
my_lock->fl_ = std::move(fl); |
||||
if (!my_lock->fl_.try_lock()) { |
||||
return Status::IOError("database already in use: could not acquire exclusive lock"); |
||||
} |
||||
*lock = my_lock; |
||||
} catch (const std::exception & e) { |
||||
result = Status::IOError("lock " + fname, e.what()); |
||||
} |
||||
|
||||
return result; |
||||
} |
||||
|
||||
virtual Status UnlockFile(FileLock* lock) { |
||||
|
||||
Status result; |
||||
|
||||
try { |
||||
BoostFileLock * my_lock = static_cast<BoostFileLock *>(lock); |
||||
my_lock->fl_.unlock(); |
||||
delete my_lock; |
||||
} catch (const std::exception & e) { |
||||
result = Status::IOError("unlock", e.what()); |
||||
} |
||||
|
||||
return result; |
||||
} |
||||
|
||||
virtual void Schedule(void (*function)(void*), void* arg); |
||||
|
||||
virtual void StartThread(void (*function)(void* arg), void* arg); |
||||
|
||||
virtual Status GetTestDirectory(std::string* result) { |
||||
boost::system::error_code ec; |
||||
boost::filesystem::path temp_dir = |
||||
boost::filesystem::temp_directory_path(ec); |
||||
if (ec != 0) { |
||||
temp_dir = "tmp"; |
||||
} |
||||
|
||||
temp_dir /= "leveldb_tests"; |
||||
temp_dir /= boost::lexical_cast<std::string>(current_process_id()); |
||||
|
||||
// Directory may already exist
|
||||
CreateDir(temp_dir.generic_string()); |
||||
|
||||
*result = temp_dir.generic_string(); |
||||
|
||||
return Status::OK(); |
||||
} |
||||
|
||||
#ifndef LEVELDB_PLATFORM_WINDOWS |
||||
static uint64_t gettid() { |
||||
pthread_t tid = pthread_self(); |
||||
uint64_t thread_id = 0; |
||||
memcpy(&thread_id, &tid, std::min(sizeof(thread_id), sizeof(tid))); |
||||
return thread_id; |
||||
} |
||||
#endif |
||||
|
||||
virtual Status NewLogger(const std::string& fname, Logger** result) { |
||||
FILE* f = fopen(fname.c_str(), "wt"); |
||||
if (f == NULL) { |
||||
*result = NULL; |
||||
return Status::IOError(fname, strerror(errno)); |
||||
} else { |
||||
#ifdef LEVELDB_PLATFORM_WINDOWS |
||||
*result = new WinLogger(f); |
||||
#else |
||||
*result = new PosixLogger(f, &PosixEnv::gettid); |
||||
#endif |
||||
return Status::OK(); |
||||
} |
||||
} |
||||
|
||||
virtual uint64_t NowMicros() { |
||||
return static_cast<uint64_t>( |
||||
boost::posix_time::microsec_clock::universal_time() |
||||
.time_of_day().total_microseconds()); |
||||
} |
||||
|
||||
virtual void SleepForMicroseconds(int micros) { |
||||
boost::this_thread::sleep(boost::posix_time::microseconds(micros)); |
||||
} |
||||
|
||||
private: |
||||
void PthreadCall(const char* label, int result) { |
||||
if (result != 0) { |
||||
fprintf(stderr, "pthread %s: %s\n", label, strerror(result)); |
||||
exit(1); |
||||
} |
||||
} |
||||
|
||||
// BGThread() is the body of the background thread
|
||||
void BGThread(); |
||||
|
||||
static void* BGThreadWrapper(void* arg) { |
||||
reinterpret_cast<PosixEnv*>(arg)->BGThread(); |
||||
return NULL; |
||||
} |
||||
|
||||
boost::mutex mu_; |
||||
boost::condition_variable bgsignal_; |
||||
boost::scoped_ptr<boost::thread> bgthread_; |
||||
|
||||
// Entry per Schedule() call
|
||||
struct BGItem { void* arg; void (*function)(void*); }; |
||||
typedef std::deque<BGItem> BGQueue; |
||||
BGQueue queue_; |
||||
}; |
||||
|
||||
PosixEnv::PosixEnv() { } |
||||
|
||||
void PosixEnv::Schedule(void (*function)(void*), void* arg) { |
||||
boost::unique_lock<boost::mutex> lock(mu_); |
||||
|
||||
// Start background thread if necessary
|
||||
if (!bgthread_) { |
||||
bgthread_.reset( |
||||
new boost::thread(boost::bind(&PosixEnv::BGThreadWrapper, this))); |
||||
} |
||||
|
||||
// Add to priority queue
|
||||
queue_.push_back(BGItem()); |
||||
queue_.back().function = function; |
||||
queue_.back().arg = arg; |
||||
|
||||
lock.unlock(); |
||||
|
||||
bgsignal_.notify_one(); |
||||
|
||||
} |
||||
|
||||
void PosixEnv::BGThread() { |
||||
while (true) { |
||||
// Wait until there is an item that is ready to run
|
||||
boost::unique_lock<boost::mutex> lock(mu_); |
||||
|
||||
while (queue_.empty()) { |
||||
bgsignal_.wait(lock); |
||||
} |
||||
|
||||
void (*function)(void*) = queue_.front().function; |
||||
void* arg = queue_.front().arg; |
||||
queue_.pop_front(); |
||||
|
||||
lock.unlock(); |
||||
(*function)(arg); |
||||
} |
||||
} |
||||
|
||||
namespace { |
||||
struct StartThreadState { |
||||
void (*user_function)(void*); |
||||
void* arg; |
||||
}; |
||||
} |
||||
|
||||
static void* StartThreadWrapper(void* arg) { |
||||
StartThreadState* state = reinterpret_cast<StartThreadState*>(arg); |
||||
state->user_function(state->arg); |
||||
delete state; |
||||
return NULL; |
||||
} |
||||
|
||||
void PosixEnv::StartThread(void (*function)(void* arg), void* arg) { |
||||
StartThreadState* state = new StartThreadState; |
||||
state->user_function = function; |
||||
state->arg = arg; |
||||
|
||||
boost::thread t(boost::bind(&StartThreadWrapper, state)); |
||||
} |
||||
|
||||
} |
||||
|
||||
static boost::once_flag once = BOOST_ONCE_INIT; |
||||
static Env* default_env; |
||||
static void InitDefaultEnv() { |
||||
::memset(global_read_only_buf, 0, sizeof(global_read_only_buf)); |
||||
default_env = new PosixEnv; |
||||
} |
||||
|
||||
Env* Env::Default() { |
||||
boost::call_once(once, InitDefaultEnv); |
||||
|
||||
return default_env; |
||||
} |
||||
|
||||
} |
||||
@ -0,0 +1,96 @@
@@ -0,0 +1,96 @@
|
||||
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style license that can be
|
||||
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
||||
|
||||
#include "util/win_logger.h" |
||||
|
||||
#include <windows.h> |
||||
|
||||
namespace leveldb { |
||||
|
||||
void WinLogger::Logv(const char* format, va_list ap) { |
||||
const uint64_t thread_id = static_cast<uint64_t>(::GetCurrentThreadId()); |
||||
|
||||
// We try twice: the first time with a fixed-size stack allocated buffer,
|
||||
// and the second time with a much larger dynamically allocated buffer.
|
||||
char buffer[500]; |
||||
|
||||
for (int iter = 0; iter < 2; iter++) { |
||||
char* base; |
||||
int bufsize; |
||||
if (iter == 0) { |
||||
bufsize = sizeof(buffer); |
||||
base = buffer; |
||||
} else { |
||||
bufsize = 30000; |
||||
base = new char[bufsize]; |
||||
} |
||||
|
||||
char* p = base; |
||||
char* limit = base + bufsize; |
||||
|
||||
SYSTEMTIME st; |
||||
|
||||
// GetSystemTime returns UTC time, we want local time!
|
||||
::GetLocalTime(&st); |
||||
|
||||
#ifdef _MSC_VER |
||||
p += _snprintf_s(p, limit - p, _TRUNCATE, |
||||
"%04d/%02d/%02d-%02d:%02d:%02d.%03d %llx ", |
||||
st.wYear, |
||||
st.wMonth, |
||||
st.wDay, |
||||
st.wHour, |
||||
st.wMinute, |
||||
st.wSecond, |
||||
st.wMilliseconds, |
||||
static_cast<long long unsigned int>(thread_id)); |
||||
#else |
||||
#ifdef __MINGW32__ |
||||
p += snprintf(p, limit - p, |
||||
"%04d/%02d/%02d-%02d:%02d:%02d.%03d %llx ", |
||||
st.wYear, |
||||
st.wMonth, |
||||
st.wDay, |
||||
st.wHour, |
||||
st.wMinute, |
||||
st.wSecond, |
||||
st.wMilliseconds, |
||||
static_cast<long long unsigned int>(thread_id)); |
||||
#else |
||||
#error Unable to detect Windows compiler (neither _MSC_VER nor __MINGW32__ are set) |
||||
#endif |
||||
#endif |
||||
|
||||
// Print the message
|
||||
if (p < limit) { |
||||
va_list backup_ap = ap; |
||||
p += vsnprintf(p, limit - p, format, backup_ap); |
||||
va_end(backup_ap); |
||||
} |
||||
|
||||
// Truncate to available space if necessary
|
||||
if (p >= limit) { |
||||
if (iter == 0) { |
||||
continue; // Try again with larger buffer
|
||||
} else { |
||||
p = limit - 1; |
||||
} |
||||
} |
||||
|
||||
// Add newline if necessary
|
||||
if (p == base || p[-1] != '\n') { |
||||
*p++ = '\n'; |
||||
} |
||||
|
||||
assert(p <= limit); |
||||
fwrite(base, 1, p - base, file_); |
||||
fflush(file_); |
||||
if (base != buffer) { |
||||
delete[] base; |
||||
} |
||||
break; |
||||
} |
||||
} |
||||
|
||||
} |
||||
@ -0,0 +1,28 @@
@@ -0,0 +1,28 @@
|
||||
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style license that can be
|
||||
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
||||
|
||||
// Logger implementation for Windows
|
||||
|
||||
#ifndef STORAGE_LEVELDB_UTIL_WIN_LOGGER_H_ |
||||
#define STORAGE_LEVELDB_UTIL_WIN_LOGGER_H_ |
||||
|
||||
#include <stdio.h> |
||||
#include "leveldb/env.h" |
||||
|
||||
namespace leveldb { |
||||
|
||||
class WinLogger : public Logger { |
||||
private: |
||||
FILE* file_; |
||||
public: |
||||
explicit WinLogger(FILE* f) : file_(f) { assert(file_); } |
||||
virtual ~WinLogger() { |
||||
fclose(file_); |
||||
} |
||||
virtual void Logv(const char* format, va_list ap); |
||||
|
||||
}; |
||||
|
||||
} |
||||
#endif // STORAGE_LEVELDB_UTIL_WIN_LOGGER_H_
|
||||
Loading…
Reference in new issue