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Kernel: Added WaitObject and changed "waitable" objects inherit from it.

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This commit is contained in:
bunnei 2015-01-14 19:22:50 -05:00
parent 0c7498545f
commit c22bac6398
8 changed files with 73 additions and 71 deletions
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29
src/core/hle/kernel/mutex.cpp
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@ -13,7 +13,7 @@
namespace Kernel {
class Mutex : public Object {
class Mutex : public WaitObject {
public:
std::string GetTypeName() const override { return "Mutex"; }
std::string GetName() const override { return name; }
@ -24,7 +24,6 @@ public:
bool initial_locked; ///< Initial lock state when mutex was created
bool locked; ///< Current locked state
Handle lock_thread; ///< Handle to thread that currently has mutex
std::vector<Handle> waiting_threads; ///< Threads that are waiting for the mutex
std::string name; ///< Name of mutex (optional)
ResultVal<bool> WaitSynchronization() override;
@ -45,36 +44,20 @@ void MutexAcquireLock(Mutex* mutex, Handle thread = GetCurrentThread()->GetHandl
mutex->lock_thread = thread;
}
bool ReleaseMutexForThread(Mutex* mutex, Handle thread_handle) {
MutexAcquireLock(mutex, thread_handle);
Thread* thread = Kernel::g_handle_table.Get<Thread>(thread_handle).get();
if (thread == nullptr) {
LOG_ERROR(Kernel, "Called with invalid handle: %08X", thread_handle);
return false;
}
thread->ResumeFromWait();
return true;
}
/**
* Resumes a thread waiting for the specified mutex
* @param mutex The mutex that some thread is waiting on
*/
void ResumeWaitingThread(Mutex* mutex) {
// Find the next waiting thread for the mutex...
if (mutex->waiting_threads.empty()) {
auto next_thread = mutex->ResumeNextThread();
if (next_thread != nullptr) {
MutexAcquireLock(mutex, next_thread->GetHandle());
} else {
// Reset mutex lock thread handle, nothing is waiting
mutex->locked = false;
mutex->lock_thread = -1;
}
else {
// Resume the next waiting thread and re-lock the mutex
std::vector<Handle>::iterator iter = mutex->waiting_threads.begin();
ReleaseMutexForThread(mutex, *iter);
mutex->waiting_threads.erase(iter);
}
}
void MutexEraseLock(Mutex* mutex) {
@ -175,7 +158,7 @@ Handle CreateMutex(bool initial_locked, const std::string& name) {
ResultVal<bool> Mutex::WaitSynchronization() {
bool wait = locked;
if (locked) {
waiting_threads.push_back(GetCurrentThread()->GetHandle());
AddWaitingThread(GetCurrentThread());
Kernel::WaitCurrentThread(WAITTYPE_MUTEX, this);
} else {
// Lock the mutex when the first thread accesses it