0a564039ca
(This is a merge of http://go/wvgerrit/13400 from the Widevine CDM repository.) Replace "}; // namespace" with "} // namespace": ag -l --ignore-dir third_party "}; //" | \ while read f; do sed -r -i 's/\}; \/\//} \/\//' $f ; done Replace "// unnamed namespace" with "// namespace": ag -l --ignore-dir third_party "unnamed namespace" | \ while read f; do sed -r -i 's/unnamed namespace/namespace/' $f ; done Change-Id: I50ece9a127ce669f15cd532dfae1dd741338a075
56 lines
1.2 KiB
C++
56 lines
1.2 KiB
C++
// Copyright 2013 Google Inc. All Rights Reserved.
|
|
//
|
|
// Lock - Platform independent interface for a Mutex class
|
|
//
|
|
#ifndef WVCDM_CORE_LOCK_H_
|
|
#define WVCDM_CORE_LOCK_H_
|
|
|
|
#include "wv_cdm_types.h"
|
|
|
|
namespace wvcdm {
|
|
|
|
// Simple lock class. The implementation is platform dependent.
|
|
//
|
|
// The lock must be unlocked by the thread that locked it.
|
|
// The lock is also not recursive (ie. cannot be taken multiple times).
|
|
class Lock {
|
|
public:
|
|
Lock();
|
|
~Lock();
|
|
|
|
void Acquire();
|
|
void Release();
|
|
|
|
// Acquires a lock if not held and returns true.
|
|
// Returns false if the lock is held by another thread.
|
|
bool Try();
|
|
|
|
friend class AutoLock;
|
|
|
|
private:
|
|
class Impl;
|
|
Impl* impl_;
|
|
|
|
CORE_DISALLOW_COPY_AND_ASSIGN(Lock);
|
|
};
|
|
|
|
// Manages the lock automatically. It will be locked when AutoLock
|
|
// is constructed and release when AutoLock goes out of scope.
|
|
class AutoLock {
|
|
public:
|
|
explicit AutoLock(Lock& lock) : lock_(&lock) { lock_->Acquire(); }
|
|
|
|
explicit AutoLock(Lock* lock) : lock_(lock) { lock_->Acquire(); }
|
|
|
|
~AutoLock() { lock_->Release(); }
|
|
|
|
private:
|
|
Lock* lock_;
|
|
|
|
CORE_DISALLOW_COPY_AND_ASSIGN(AutoLock);
|
|
};
|
|
|
|
} // namespace wvcdm
|
|
|
|
#endif // WVCDM_CORE_LOCK_H_
|