41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
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//===-- asan_lock.h ---------------------------------------------*- C++ -*-===//
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of AddressSanitizer, an address sanity checker.
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//
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// A wrapper for a simple lock.
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//===----------------------------------------------------------------------===//
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#ifndef ASAN_LOCK_H
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#define ASAN_LOCK_H
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#include "sanitizer_common/sanitizer_mutex.h"
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#include "asan_internal.h"
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// The locks in ASan are global objects and they are never destroyed to avoid
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// at-exit races (that is, a lock is being used by other threads while the main
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// thread is doing atexit destructors).
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// We define the class using opaque storage to avoid including system headers.
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namespace __asan {
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class AsanLock {
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public:
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explicit AsanLock(LinkerInitialized);
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void Lock();
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void Unlock();
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bool IsLocked() { return owner_ != 0; }
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private:
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uptr opaque_storage_[10];
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uptr owner_; // for debugging and for malloc_introspection_t interface
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};
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typedef GenericScopedLock<AsanLock> ScopedLock;
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} // namespace __asan
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#endif // ASAN_LOCK_H
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