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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include <map>
#include <vector>
#include "common/common.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/semaphore.h"
#include "core/hle/kernel/thread.h"
namespace Kernel {
class Semaphore : public Object {
public:
std::string GetTypeName() const override { return "Semaphore"; }
std::string GetName() const override { return name; }
static Kernel::HandleType GetStaticHandleType() { return Kernel::HandleType::Semaphore; }
Kernel::HandleType GetHandleType() const override { return Kernel::HandleType::Semaphore; }
u32 initial_count; ///< Number of reserved entries
u32 max_count; ///< Maximum number of simultaneous holders the semaphore can have
u32 current_usage; ///< Number of currently used entries in the semaphore
std::vector<Handle> waiting_threads; ///< Threads that are waiting for the semaphore
std::string name; ///< Name of semaphore (optional)
ResultVal<bool> SyncRequest() override {
// TODO(Subv): ImplementMe
return MakeResult<bool>(false);
}
ResultVal<bool> WaitSynchronization() override {
bool wait = current_usage == max_count;
if (wait) {
Kernel::WaitCurrentThread(WAITTYPE_SEMA, GetHandle());
waiting_threads.push_back(GetCurrentThreadHandle());
} else {
++current_usage;
}
return MakeResult<bool>(wait);
}
};
////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Creates a semaphore
* @param handle Reference to handle for the newly created semaphore
* @param initial_count initial amount of times the semaphore is held
* @param max_count maximum number of holders the semaphore can have
* @param name Optional name of semaphore
* @return Pointer to new Semaphore object
*/
Semaphore* CreateSemaphore(Handle& handle, u32 initial_count, u32 max_count, const std::string& name) {
Semaphore* semaphore = new Semaphore;
handle = Kernel::g_object_pool.Create(semaphore);
semaphore->initial_count = semaphore->current_usage = initial_count;
semaphore->max_count = max_count;
semaphore->name = name;
return semaphore;
}
Handle CreateSemaphore(u32 initial_count, u32 max_count, const std::string& name) {
Handle handle;
Semaphore* semaphore = CreateSemaphore(handle, initial_count, max_count, name);
return handle;
}
} // namespace
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