56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
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#pragma once
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#include <glacier/container/intrusive_list.h>
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#include <glacier/memory/ref_ptr.h>
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#include "include/ztypes.h"
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#include "object/kernel_object.h"
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#include "object/thread.h"
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class Mutex;
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template <>
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struct KernelObjectTag<Mutex> {
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static const uint64_t type = KernelObject::MUTEX;
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};
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class Mutex : public KernelObject {
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public:
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uint64_t TypeTag() override { return KernelObject::MUTEX; }
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static uint64_t DefaultPermissions() {
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return kZionPerm_Lock | kZionPerm_Release;
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}
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static glcr::RefPtr<Mutex> Create();
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// Attempts to lock the mutex, suspends the current thread
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// until the lock is acquired.
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void Lock();
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// Releases the mutex and activates the next thread in the
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// blocked queue if it exists.
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void Release();
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private:
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uint8_t lock_ = 0;
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glcr::IntrusiveList<Thread> blocked_threads_;
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Mutex() {}
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};
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class MutexHolder {
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public:
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MutexHolder(const glcr::RefPtr<Mutex>& mutex) : mutex_(mutex) {
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mutex_->Lock();
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}
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~MutexHolder() { mutex_->Release(); }
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MutexHolder(MutexHolder&) = delete;
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MutexHolder(MutexHolder&&) = delete;
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private:
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glcr::RefPtr<Mutex> mutex_;
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};
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