Merge pull request #246 from Subv/cbranch_1
SVC: Implemented Semaphores
This commit is contained in:
commit
17b4d6747a
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@ -28,6 +28,7 @@ set(SRCS
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hle/kernel/event.cpp
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hle/kernel/kernel.cpp
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hle/kernel/mutex.cpp
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hle/kernel/semaphore.cpp
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hle/kernel/shared_memory.cpp
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hle/kernel/thread.cpp
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hle/service/ac_u.cpp
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@ -106,6 +107,7 @@ set(HEADERS
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hle/kernel/event.h
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hle/kernel/kernel.h
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hle/kernel/mutex.h
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hle/kernel/semaphore.h
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hle/kernel/shared_memory.h
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hle/kernel/thread.h
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hle/service/ac_u.h
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@ -114,6 +114,20 @@ template<s32 func(u32*, const char*)> void Wrap() {
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FuncReturn(retval);
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}
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template<s32 func(u32*, s32, s32)> void Wrap() {
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u32 param_1 = 0;
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u32 retval = func(¶m_1, PARAM(1), PARAM(2));
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Core::g_app_core->SetReg(1, param_1);
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FuncReturn(retval);
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}
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template<s32 func(s32*, u32, s32)> void Wrap() {
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s32 param_1 = 0;
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u32 retval = func(¶m_1, PARAM(1), PARAM(2));
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Core::g_app_core->SetReg(1, param_1);
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FuncReturn(retval);
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// Function wrappers that return type u32
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@ -0,0 +1,94 @@
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// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include <queue>
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#include "common/common.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/semaphore.h"
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#include "core/hle/kernel/thread.h"
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namespace Kernel {
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class Semaphore : public Object {
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public:
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std::string GetTypeName() const override { return "Semaphore"; }
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std::string GetName() const override { return name; }
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static Kernel::HandleType GetStaticHandleType() { return Kernel::HandleType::Semaphore; }
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Kernel::HandleType GetHandleType() const override { return Kernel::HandleType::Semaphore; }
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u32 max_count; ///< Maximum number of simultaneous holders the semaphore can have
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u32 available_count; ///< Number of free slots left in the semaphore
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std::queue<Handle> waiting_threads; ///< Threads that are waiting for the semaphore
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std::string name; ///< Name of semaphore (optional)
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/**
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* Tests whether a semaphore still has free slots
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* @return Whether the semaphore is available
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*/
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bool IsAvailable() const {
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return available_count > 0;
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}
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ResultVal<bool> WaitSynchronization() override {
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bool wait = !IsAvailable();
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if (wait) {
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Kernel::WaitCurrentThread(WAITTYPE_SEMA, GetHandle());
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waiting_threads.push(GetCurrentThreadHandle());
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} else {
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--available_count;
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}
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return MakeResult<bool>(wait);
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}
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};
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////////////////////////////////////////////////////////////////////////////////////////////////////
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ResultCode CreateSemaphore(Handle* handle, u32 initial_count,
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u32 max_count, const std::string& name) {
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if (initial_count > max_count)
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return ResultCode(ErrorDescription::InvalidCombination, ErrorModule::Kernel,
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ErrorSummary::WrongArgument, ErrorLevel::Permanent);
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Semaphore* semaphore = new Semaphore;
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*handle = g_object_pool.Create(semaphore);
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// When the semaphore is created, some slots are reserved for other threads,
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// and the rest is reserved for the caller thread
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semaphore->max_count = max_count;
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semaphore->available_count = initial_count;
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semaphore->name = name;
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return RESULT_SUCCESS;
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}
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ResultCode ReleaseSemaphore(s32* count, Handle handle, s32 release_count) {
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Semaphore* semaphore = g_object_pool.Get<Semaphore>(handle);
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if (semaphore == nullptr)
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return InvalidHandle(ErrorModule::Kernel);
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if (semaphore->max_count - semaphore->available_count < release_count)
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return ResultCode(ErrorDescription::OutOfRange, ErrorModule::Kernel,
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ErrorSummary::InvalidArgument, ErrorLevel::Permanent);
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*count = semaphore->available_count;
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semaphore->available_count += release_count;
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// Notify some of the threads that the semaphore has been released
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// stop once the semaphore is full again or there are no more waiting threads
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while (!semaphore->waiting_threads.empty() && semaphore->IsAvailable()) {
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Kernel::ResumeThreadFromWait(semaphore->waiting_threads.front());
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semaphore->waiting_threads.pop();
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--semaphore->available_count;
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}
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return RESULT_SUCCESS;
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}
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} // namespace
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@ -0,0 +1,32 @@
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// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#include "common/common_types.h"
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#include "core/hle/kernel/kernel.h"
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namespace Kernel {
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/**
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* Creates a semaphore.
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* @param handle Pointer to the handle of the newly created object
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* @param initial_count Number of slots reserved for other threads
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* @param max_count Maximum number of slots the semaphore can have
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* @param name Optional name of semaphore
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* @return ResultCode of the error
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*/
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ResultCode CreateSemaphore(Handle* handle, u32 initial_count, u32 max_count, const std::string& name = "Unknown");
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/**
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* Releases a certain number of slots from a semaphore.
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* @param count The number of free slots the semaphore had before this call
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* @param handle The handle of the semaphore to release
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* @param release_count The number of slots to release
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* @return ResultCode of the error
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*/
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ResultCode ReleaseSemaphore(s32* count, Handle handle, s32 release_count);
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} // namespace
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@ -12,6 +12,7 @@
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#include "core/hle/kernel/address_arbiter.h"
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#include "core/hle/kernel/event.h"
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#include "core/hle/kernel/mutex.h"
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#include "core/hle/kernel/semaphore.h"
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#include "core/hle/kernel/shared_memory.h"
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#include "core/hle/kernel/thread.h"
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@ -288,6 +289,21 @@ static Result GetThreadId(u32* thread_id, Handle handle) {
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return result.raw;
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}
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/// Creates a semaphore
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static Result CreateSemaphore(Handle* semaphore, s32 initial_count, s32 max_count) {
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ResultCode res = Kernel::CreateSemaphore(semaphore, initial_count, max_count);
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LOG_TRACE(Kernel_SVC, "called initial_count=%d, max_count=%d, created handle=0x%08X",
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initial_count, max_count, *semaphore);
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return res.raw;
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}
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/// Releases a certain number of slots in a semaphore
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static Result ReleaseSemaphore(s32* count, Handle semaphore, s32 release_count) {
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LOG_TRACE(Kernel_SVC, "called release_count=%d, handle=0x%08X", release_count, semaphore);
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ResultCode res = Kernel::ReleaseSemaphore(count, semaphore, release_count);
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return res.raw;
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}
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/// Query memory
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static Result QueryMemory(void* info, void* out, u32 addr) {
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LOG_ERROR(Kernel_SVC, "(UNIMPLEMENTED) called addr=0x%08X", addr);
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@ -366,8 +382,8 @@ const HLE::FunctionDef SVC_Table[] = {
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{0x12, nullptr, "Run"},
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{0x13, HLE::Wrap<CreateMutex>, "CreateMutex"},
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{0x14, HLE::Wrap<ReleaseMutex>, "ReleaseMutex"},
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{0x15, nullptr, "CreateSemaphore"},
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{0x16, nullptr, "ReleaseSemaphore"},
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{0x15, HLE::Wrap<CreateSemaphore>, "CreateSemaphore"},
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{0x16, HLE::Wrap<ReleaseSemaphore>, "ReleaseSemaphore"},
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{0x17, HLE::Wrap<CreateEvent>, "CreateEvent"},
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{0x18, HLE::Wrap<SignalEvent>, "SignalEvent"},
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{0x19, HLE::Wrap<ClearEvent>, "ClearEvent"},
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