forked from OSchip/llvm-project
55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
//===-- scudo_tls_context_android.inc ---------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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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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/// Android specific base thread context definition.
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///
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//===----------------------------------------------------------------------===//
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#ifndef SCUDO_TLS_CONTEXT_ANDROID_INC_
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#define SCUDO_TLS_CONTEXT_ANDROID_INC_
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#ifndef SCUDO_TLS_H_
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# error "This file must be included inside scudo_tls.h."
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#endif // SCUDO_TLS_H_
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#if SANITIZER_LINUX && SANITIZER_ANDROID
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struct ScudoThreadContextPlatform {
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INLINE bool tryLock() {
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if (Mutex.TryLock()) {
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atomic_store_relaxed(&SlowLockPrecedence, 0);
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return true;
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}
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if (atomic_load_relaxed(&SlowLockPrecedence) == 0)
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atomic_store_relaxed(&SlowLockPrecedence, NanoTime());
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return false;
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}
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INLINE void lock() {
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Mutex.Lock();
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atomic_store_relaxed(&SlowLockPrecedence, 0);
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}
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INLINE void unlock() {
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Mutex.Unlock();
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}
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INLINE u64 getSlowLockPrecedence() {
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return atomic_load_relaxed(&SlowLockPrecedence);
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}
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private:
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StaticSpinMutex Mutex;
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atomic_uint64_t SlowLockPrecedence;
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};
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#endif // SANITIZER_LINUX && SANITIZER_ANDROID
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#endif // SCUDO_TLS_CONTEXT_ANDROID_INC_
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