57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
/*
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* nextpnr -- Next Generation Place and Route
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*
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* Copyright (C) 2021 Symbiflow Authors.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#ifndef SCOPE_LOCK_H
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#define SCOPE_LOCK_H
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namespace nextpnr {
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// Provides a simple RIAA locking object. ScopeLock takes a lock when
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// constructed, and releases the lock on destruction or if "unlock_early" is
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// called.
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//
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// LockingObject must have a method "void lock(void)" and "void unlock(void)".
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template<typename LockingObject>
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class ScopeLock {
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public:
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ScopeLock(LockingObject * obj) : obj_(obj), locked_(false) {
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obj_->lock();
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locked_ = true;
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}
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ScopeLock(const ScopeLock &other) = delete;
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ScopeLock(const ScopeLock &&other) = delete;
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~ScopeLock() {
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if(locked_) {
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obj_->unlock();
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}
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}
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void unlock_early() {
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locked_ = false;
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obj_->unlock();
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}
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private:
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LockingObject *obj_;
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bool locked_;
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};
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};
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#endif /* SCOPE_LOCK_H */
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