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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/src/vm/Monitor.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/vm/Monitor.h')
-rw-r--r-- | js/src/vm/Monitor.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/js/src/vm/Monitor.h b/js/src/vm/Monitor.h new file mode 100644 index 0000000000..6c0fbff0d9 --- /dev/null +++ b/js/src/vm/Monitor.h @@ -0,0 +1,72 @@ +/* -*- 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 vm_Monitor_h +#define vm_Monitor_h + +#include "threading/ConditionVariable.h" +#include "threading/Mutex.h" + +namespace js { + +// A base class used for types intended to be used in a parallel +// fashion. Combines a lock and a condition variable. You can +// acquire the lock or signal the condition variable using the +// |AutoLockMonitor| type. + +class Monitor { + protected: + friend class AutoLockMonitor; + friend class AutoUnlockMonitor; + + Mutex lock_ MOZ_UNANNOTATED; + ConditionVariable condVar_; + + public: + explicit Monitor(const MutexId& id) : lock_(id) {} +}; + +class AutoLockMonitor : public LockGuard<Mutex> { + private: + using Base = LockGuard<Mutex>; + Monitor& monitor; + + public: + explicit AutoLockMonitor(Monitor& monitor) + : Base(monitor.lock_), monitor(monitor) {} + + bool isFor(Monitor& other) const { return &monitor.lock_ == &other.lock_; } + + void wait(ConditionVariable& condVar) { condVar.wait(*this); } + + void wait() { wait(monitor.condVar_); } + + void notify(ConditionVariable& condVar) { condVar.notify_one(); } + + void notify() { notify(monitor.condVar_); } + + void notifyAll(ConditionVariable& condVar) { condVar.notify_all(); } + + void notifyAll() { notifyAll(monitor.condVar_); } +}; + +class AutoUnlockMonitor { + private: + Monitor& monitor; + + public: + explicit AutoUnlockMonitor(Monitor& monitor) : monitor(monitor) { + monitor.lock_.unlock(); + } + + ~AutoUnlockMonitor() { monitor.lock_.lock(); } + + bool isFor(Monitor& other) const { return &monitor.lock_ == &other.lock_; } +}; + +} // namespace js + +#endif /* vm_Monitor_h */ |