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@ -93,8 +93,26 @@ class CondVar {
@@ -93,8 +93,26 @@ class CondVar {
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}; |
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typedef void* OnceType; |
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#define LEVELDB_ONCE_INIT 0 |
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class OnceType { |
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public: |
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// OnceType() : init_(false) {}
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OnceType(const OnceType &once) : init_(once.init_) {} |
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OnceType(bool f) : init_(f) {} |
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void InitOnce(void (*initializer)()) { |
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mutex_.Lock(); |
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if (!init_) { |
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init_ = true; |
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initializer(); |
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} |
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mutex_.Unlock(); |
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} |
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private: |
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bool init_; |
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Mutex mutex_; |
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}; |
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#define LEVELDB_ONCE_INIT false |
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extern void InitOnce(port::OnceType*, void (*initializer)()); |
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// Storage for a lock-free pointer
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