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-rw-r--r--mozglue/misc/PlatformMutex.h66
1 files changed, 66 insertions, 0 deletions
diff --git a/mozglue/misc/PlatformMutex.h b/mozglue/misc/PlatformMutex.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_PlatformMutex_h
+#define mozilla_PlatformMutex_h
+
+#include <utility>
+
+#include "mozilla/Attributes.h"
+#include "mozilla/Types.h"
+
+#if !defined(XP_WIN) && !defined(__wasi__)
+# include <pthread.h>
+#endif
+
+namespace mozilla {
+
+namespace detail {
+
+class ConditionVariableImpl;
+
+class MutexImpl {
+ public:
+ struct PlatformData;
+
+ explicit MFBT_API MutexImpl();
+ MFBT_API ~MutexImpl();
+
+ protected:
+ MFBT_API void lock();
+ MFBT_API void unlock();
+ // We have a separate, forwarding API so internal uses don't have to go
+ // through the PLT.
+ MFBT_API bool tryLock();
+
+ private:
+ MutexImpl(const MutexImpl&) = delete;
+ void operator=(const MutexImpl&) = delete;
+ MutexImpl(MutexImpl&&) = delete;
+ void operator=(MutexImpl&&) = delete;
+ bool operator==(const MutexImpl& rhs) = delete;
+
+ void mutexLock();
+ bool mutexTryLock();
+
+ PlatformData* platformData();
+
+#if !defined(XP_WIN) && !defined(__wasi__)
+ void* platformData_[sizeof(pthread_mutex_t) / sizeof(void*)];
+ static_assert(sizeof(pthread_mutex_t) / sizeof(void*) != 0 &&
+ sizeof(pthread_mutex_t) % sizeof(void*) == 0,
+ "pthread_mutex_t must have pointer alignment");
+#else
+ void* platformData_[6];
+#endif
+
+ friend class mozilla::detail::ConditionVariableImpl;
+};
+
+} // namespace detail
+
+} // namespace mozilla
+#endif // mozilla_PlatformMutex_h