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tasklist code now tested in a multi threaded environment.

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erdgeist 2007-11-15 03:35:03 +00:00
parent e476006019
commit d3963803ca
1 changed files with 37 additions and 6 deletions
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43
ot_mutex.c
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@ -14,6 +14,9 @@
#include "trackerlogic.h" #include "trackerlogic.h"
#include "ot_mutex.h" #include "ot_mutex.h"
//#define MTX_DBG( STRING ) fprintf( stderr, STRING )
#define MTX_DBG( STRING )
/* Our global all torrents list */ /* Our global all torrents list */
static ot_vector all_torrents[OT_BUCKET_COUNT]; static ot_vector all_torrents[OT_BUCKET_COUNT];
@ -114,14 +117,18 @@ int mutex_workqueue_pushtask( int64 socket, ot_tasktype tasktype ) {
struct ot_task ** tmptask, * task; struct ot_task ** tmptask, * task;
/* Want exclusive access to tasklist */ /* Want exclusive access to tasklist */
MTX_DBG( "pushtask locks.\n" );
pthread_mutex_lock( &tasklist_mutex ); pthread_mutex_lock( &tasklist_mutex );
MTX_DBG( "pushtask locked.\n" );
task = malloc(sizeof( struct ot_task)); task = malloc(sizeof( struct ot_task));
if( !task ) { if( !task ) {
MTX_DBG( "pushtask fail unlocks.\n" );
pthread_mutex_unlock( &tasklist_mutex ); pthread_mutex_unlock( &tasklist_mutex );
MTX_DBG( "pushtask fail unlocked.\n" );
return -1; return -1;
} }
/* Skip to end of list */ /* Skip to end of list */
tmptask = &tasklist; tmptask = &tasklist;
while( *tmptask ) while( *tmptask )
@ -136,8 +143,11 @@ int mutex_workqueue_pushtask( int64 socket, ot_tasktype tasktype ) {
task->next = 0; task->next = 0;
/* Inform waiting workers and release lock */ /* Inform waiting workers and release lock */
MTX_DBG( "pushtask broadcasts.\n" );
pthread_cond_broadcast( &tasklist_being_filled ); pthread_cond_broadcast( &tasklist_being_filled );
MTX_DBG( "pushtask broadcasted, mutex unlocks.\n" );
pthread_mutex_unlock( &tasklist_mutex ); pthread_mutex_unlock( &tasklist_mutex );
MTX_DBG( "pushtask end mutex unlocked.\n" );
return 0; return 0;
} }
@ -145,7 +155,9 @@ void mutex_workqueue_canceltask( int64 socket ) {
struct ot_task ** task; struct ot_task ** task;
/* Want exclusive access to tasklist */ /* Want exclusive access to tasklist */
MTX_DBG( "canceltask locks.\n" );
pthread_mutex_lock( &tasklist_mutex ); pthread_mutex_lock( &tasklist_mutex );
MTX_DBG( "canceltask locked.\n" );
task = &tasklist; task = &tasklist;
while( *task && ( (*task)->socket != socket ) ) while( *task && ( (*task)->socket != socket ) )
@ -165,7 +177,9 @@ void mutex_workqueue_canceltask( int64 socket ) {
} }
/* Release lock */ /* Release lock */
MTX_DBG( "canceltask unlocks.\n" );
pthread_mutex_unlock( &tasklist_mutex ); pthread_mutex_unlock( &tasklist_mutex );
MTX_DBG( "canceltask unlocked.\n" );
} }
ot_taskid mutex_workqueue_poptask( ot_tasktype tasktype ) { ot_taskid mutex_workqueue_poptask( ot_tasktype tasktype ) {
@ -173,7 +187,9 @@ ot_taskid mutex_workqueue_poptask( ot_tasktype tasktype ) {
ot_taskid taskid = 0; ot_taskid taskid = 0;
/* Want exclusive access to tasklist */ /* Want exclusive access to tasklist */
MTX_DBG( "poptask mutex locks.\n" );
pthread_mutex_lock( &tasklist_mutex ); pthread_mutex_lock( &tasklist_mutex );
MTX_DBG( "poptask mutex locked.\n" );
while( !taskid ) { while( !taskid ) {
/* Skip to the first unassigned task this worker wants to do */ /* Skip to the first unassigned task this worker wants to do */
@ -185,15 +201,18 @@ ot_taskid mutex_workqueue_poptask( ot_tasktype tasktype ) {
and leave the loop */ and leave the loop */
if( task ) { if( task ) {
task->taskid = taskid = ++next_free_taskid; task->taskid = taskid = ++next_free_taskid;
break; } else {
/* Wait until the next task is being fed */
MTX_DBG( "poptask cond waits.\n" );
pthread_cond_wait( &tasklist_being_filled, &tasklist_mutex );
MTX_DBG( "poptask cond waited.\n" );
} }
/* Wait until the next task is being fed */
pthread_cond_wait( &tasklist_being_filled, &tasklist_mutex );
} }
/* Release lock */ /* Release lock */
MTX_DBG( "poptask end mutex unlocks.\n" );
pthread_mutex_unlock( &tasklist_mutex ); pthread_mutex_unlock( &tasklist_mutex );
MTX_DBG( "poptask end mutex unlocked.\n" );
return taskid; return taskid;
} }
@ -201,7 +220,9 @@ ot_taskid mutex_workqueue_poptask( ot_tasktype tasktype ) {
int mutex_workqueue_pushresult( ot_taskid taskid, int iovec_entries, struct iovec *iovec ) { int mutex_workqueue_pushresult( ot_taskid taskid, int iovec_entries, struct iovec *iovec ) {
struct ot_task * task; struct ot_task * task;
/* Want exclusive access to tasklist */ /* Want exclusive access to tasklist */
MTX_DBG( "pushresult locks.\n" );
pthread_mutex_lock( &tasklist_mutex ); pthread_mutex_lock( &tasklist_mutex );
MTX_DBG( "pushresult locked.\n" );
task = tasklist; task = tasklist;
while( task && ( task->taskid != taskid ) ) while( task && ( task->taskid != taskid ) )
@ -214,7 +235,9 @@ int mutex_workqueue_pushresult( ot_taskid taskid, int iovec_entries, struct iove
} }
/* Release lock */ /* Release lock */
MTX_DBG( "pushresult unlocks.\n" );
pthread_mutex_unlock( &tasklist_mutex ); pthread_mutex_unlock( &tasklist_mutex );
MTX_DBG( "pushresult unlocked.\n" );
/* Indicate whether the worker has to throw away results */ /* Indicate whether the worker has to throw away results */
return task ? 0 : -1; return task ? 0 : -1;
@ -225,11 +248,13 @@ int64 mutex_workqueue_popresult( int *iovec_entries, struct iovec ** iovec ) {
int64 socket = -1; int64 socket = -1;
/* Want exclusive access to tasklist */ /* Want exclusive access to tasklist */
MTX_DBG( "popresult locks.\n" );
pthread_mutex_lock( &tasklist_mutex ); pthread_mutex_lock( &tasklist_mutex );
MTX_DBG( "popresult locked.\n" );
task = &tasklist; task = &tasklist;
while( *task && ( (*task)->tasktype != OT_TASKTYPE_DONE ) ) while( *task && ( (*task)->tasktype != OT_TASKTYPE_DONE ) )
*task = (*task)->next; task = &(*task)->next;
if( *task && ( (*task)->tasktype == OT_TASKTYPE_DONE ) ) { if( *task && ( (*task)->tasktype == OT_TASKTYPE_DONE ) ) {
struct ot_task *ptask = *task; struct ot_task *ptask = *task;
@ -243,11 +268,15 @@ int64 mutex_workqueue_popresult( int *iovec_entries, struct iovec ** iovec ) {
} }
/* Release lock */ /* Release lock */
MTX_DBG( "popresult unlocks.\n" );
pthread_mutex_unlock( &tasklist_mutex ); pthread_mutex_unlock( &tasklist_mutex );
MTX_DBG( "popresult unlocked.\n" );
return socket; return socket;
} }
void mutex_init( ) { void mutex_init( ) {
pthread_mutex_init(&tasklist_mutex, NULL);
pthread_cond_init (&tasklist_being_filled, NULL);
pthread_mutex_init(&bucket_mutex, NULL); pthread_mutex_init(&bucket_mutex, NULL);
pthread_cond_init (&bucket_being_unlocked, NULL); pthread_cond_init (&bucket_being_unlocked, NULL);
byte_zero( all_torrents, sizeof( all_torrents ) ); byte_zero( all_torrents, sizeof( all_torrents ) );
@ -256,5 +285,7 @@ void mutex_init( ) {
void mutex_deinit( ) { void mutex_deinit( ) {
pthread_mutex_destroy(&bucket_mutex); pthread_mutex_destroy(&bucket_mutex);
pthread_cond_destroy(&bucket_being_unlocked); pthread_cond_destroy(&bucket_being_unlocked);
pthread_mutex_destroy(&tasklist_mutex);
pthread_cond_destroy(&tasklist_being_filled);
byte_zero( all_torrents, sizeof( all_torrents ) ); byte_zero( all_torrents, sizeof( all_torrents ) );
} }