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authorSubv <subv2112@gmail.com>2014-12-07 21:44:21 +0100
committerSubv <subv2112@gmail.com>2014-12-07 21:44:21 +0100
commit64128aa61a7ada0744f801df116dfbe229a50382 (patch)
treec22742e84c584242f38926307aad471a952ca723 /src/core
parentMutex: Properly lock the mutex when a thread enters it (diff)
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Diffstat (limited to 'src/core')
-rw-r--r--src/core/hle/kernel/mutex.cpp68
-rw-r--r--src/core/hle/kernel/mutex.h6
-rw-r--r--src/core/hle/kernel/thread.cpp4
3 files changed, 56 insertions, 22 deletions
diff --git a/src/core/hle/kernel/mutex.cpp b/src/core/hle/kernel/mutex.cpp
index 17850c1b3..01de3c510 100644
--- a/src/core/hle/kernel/mutex.cpp
+++ b/src/core/hle/kernel/mutex.cpp
@@ -13,6 +13,9 @@
namespace Kernel {
+class Mutex;
+void MutexAcquireLock(Mutex* mutex, Handle thread = GetCurrentThreadHandle());
+
class Mutex : public Object {
public:
std::string GetTypeName() const override { return "Mutex"; }
@@ -34,6 +37,7 @@ public:
} else {
// Lock the mutex when the first thread accesses it
locked = true;
+ MutexAcquireLock(this);
}
return MakeResult<bool>(wait);
@@ -45,21 +49,46 @@ public:
typedef std::multimap<Handle, Handle> MutexMap;
static MutexMap g_mutex_held_locks;
+/**
+ * Acquires the specified mutex for the specified thread
+ * @param mutex Mutex that is to be acquired
+ * @param thread Thread that will acquired
+ */
void MutexAcquireLock(Mutex* mutex, Handle thread) {
g_mutex_held_locks.insert(std::make_pair(thread, mutex->GetHandle()));
mutex->lock_thread = thread;
}
-void MutexAcquireLock(Mutex* mutex) {
- Handle thread = GetCurrentThreadHandle();
+bool ReleaseMutexForThread(Mutex* mutex, Handle thread) {
MutexAcquireLock(mutex, thread);
+ Kernel::ResumeThreadFromWait(thread);
+ 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()) {
+ // 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) {
Handle handle = mutex->GetHandle();
auto locked = g_mutex_held_locks.equal_range(mutex->lock_thread);
for (MutexMap::iterator iter = locked.first; iter != locked.second; ++iter) {
- if ((*iter).second == handle) {
+ if (iter->second == handle) {
g_mutex_held_locks.erase(iter);
break;
}
@@ -67,6 +96,19 @@ void MutexEraseLock(Mutex* mutex) {
mutex->lock_thread = -1;
}
+void ReleaseThreadMutexes(Handle thread) {
+ auto locked = g_mutex_held_locks.equal_range(thread);
+
+ // Release every mutex that the thread holds, and resume execution on the waiting threads
+ for (MutexMap::iterator iter = locked.first; iter != locked.second; ++iter) {
+ Mutex* mutex = g_object_pool.GetFast<Mutex>(iter->second);
+ ResumeWaitingThread(mutex);
+ }
+
+ // Erase all the locks that this thread holds
+ g_mutex_held_locks.erase(thread);
+}
+
bool LockMutex(Mutex* mutex) {
// Mutex alread locked?
if (mutex->locked) {
@@ -76,27 +118,9 @@ bool LockMutex(Mutex* mutex) {
return true;
}
-bool ReleaseMutexForThread(Mutex* mutex, Handle thread) {
- MutexAcquireLock(mutex, thread);
- Kernel::ResumeThreadFromWait(thread);
- return true;
-}
-
bool ReleaseMutex(Mutex* mutex) {
MutexEraseLock(mutex);
-
- // Find the next waiting thread for the mutex...
- if (mutex->waiting_threads.empty()) {
- // 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);
- }
-
+ ResumeWaitingThread(mutex);
return true;
}
diff --git a/src/core/hle/kernel/mutex.h b/src/core/hle/kernel/mutex.h
index 155449f95..7f4909a6e 100644
--- a/src/core/hle/kernel/mutex.h
+++ b/src/core/hle/kernel/mutex.h
@@ -24,4 +24,10 @@ ResultCode ReleaseMutex(Handle handle);
*/
Handle CreateMutex(bool initial_locked, const std::string& name="Unknown");
+/**
+ * Releases all the mutexes held by the specified thread
+ * @param thread Thread that is holding the mutexes
+ */
+void ReleaseThreadMutexes(Handle thread);
+
} // namespace
diff --git a/src/core/hle/kernel/thread.cpp b/src/core/hle/kernel/thread.cpp
index 8d65dc84d..c01d76e4d 100644
--- a/src/core/hle/kernel/thread.cpp
+++ b/src/core/hle/kernel/thread.cpp
@@ -14,6 +14,7 @@
#include "core/hle/hle.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/thread.h"
+#include "core/hle/kernel/mutex.h"
#include "core/hle/result.h"
#include "core/mem_map.h"
@@ -156,6 +157,9 @@ ResultCode StopThread(Handle handle, const char* reason) {
Thread* thread = g_object_pool.Get<Thread>(handle);
if (thread == nullptr) return InvalidHandle(ErrorModule::Kernel);
+ // Release all the mutexes that this thread holds
+ ReleaseThreadMutexes(handle);
+
ChangeReadyState(thread, false);
thread->status = THREADSTATUS_DORMANT;
for (Handle waiting_handle : thread->waiting_threads) {