GRecMutex is new in glib 2.32, so we cannot use it. Introduce
a recursive mutex in qemu-thread instead, which will be used
instead of RFifoLock.
Reviewed-by: Fam Zheng <f...@redhat.com>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
include/qemu/thread-posix.h | 6 ++++++
include/qemu/thread-win32.h | 10 ++++++++++
include/qemu/thread.h | 3 +++
util/qemu-thread-posix.c | 14 ++++++++++++++
util/qemu-thread-win32.c | 25 +++++++++++++++++++++++++
5 files changed, 58 insertions(+)
diff --git a/include/qemu/thread-posix.h b/include/qemu/thread-posix.h
index aa03567..09d1e15 100644
--- a/include/qemu/thread-posix.h
+++ b/include/qemu/thread-posix.h
@@ -4,6 +4,12 @@
#include <pthread.h>
#include <semaphore.h>
+typedef QemuMutex QemuRecMutex;
+#define qemu_rec_mutex_destroy qemu_mutex_destroy
+#define qemu_rec_mutex_lock qemu_mutex_lock
+#define qemu_rec_mutex_try_lock qemu_mutex_try_lock
+#define qemu_rec_mutex_unlock qemu_mutex_unlock
+
struct QemuMutex {
pthread_mutex_t lock;
};
diff --git a/include/qemu/thread-win32.h b/include/qemu/thread-win32.h
index c7ce8dc..5fb6541 100644
--- a/include/qemu/thread-win32.h
+++ b/include/qemu/thread-win32.h
@@ -8,6 +8,16 @@ struct QemuMutex {
LONG owner;
};
+typedef struct QemuRecMutex QemuRecMutex;
+struct QemuRecMutex {
+ CRITICAL_SECTION lock;
+};
+
+void qemu_rec_mutex_destroy(QemuRecMutex *mutex);
+void qemu_rec_mutex_lock(QemuRecMutex *mutex);
+int qemu_rec_mutex_trylock(QemuRecMutex *mutex);
+void qemu_rec_mutex_unlock(QemuRecMutex *mutex);
+
struct QemuCond {
LONG waiters, target;
HANDLE sema;
diff --git a/include/qemu/thread.h b/include/qemu/thread.h
index 31237e9..e8e665f 100644
--- a/include/qemu/thread.h
+++ b/include/qemu/thread.h
@@ -25,6 +25,9 @@ void qemu_mutex_lock(QemuMutex *mutex);
int qemu_mutex_trylock(QemuMutex *mutex);
void qemu_mutex_unlock(QemuMutex *mutex);
+/* Prototypes for other functions are in thread-posix.h/thread-win32.h. */
+void qemu_rec_mutex_init(QemuRecMutex *mutex);
+
void qemu_cond_init(QemuCond *cond);
void qemu_cond_destroy(QemuCond *cond);
diff --git a/util/qemu-thread-posix.c b/util/qemu-thread-posix.c
index 74a3023..1bb00a8 100644
--- a/util/qemu-thread-posix.c
+++ b/util/qemu-thread-posix.c
@@ -80,6 +80,20 @@ void qemu_mutex_unlock(QemuMutex *mutex)
error_exit(err, __func__);
}
+void qemu_rec_mutex_init(QemuRecMutex *mutex)
+{
+ int err;
+ pthread_mutexattr_t attr;
+
+ pthread_mutexattr_init(&attr);
+ pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+ err = pthread_mutex_init(&mutex->lock, &attr);
+ pthread_mutexattr_destroy(&attr);
+ if (err) {
+ error_exit(err, __func__);
+ }
+}
+
void qemu_cond_init(QemuCond *cond)
{
int err;
diff --git a/util/qemu-thread-win32.c b/util/qemu-thread-win32.c
index 98a5ddf..171d83c 100644
--- a/util/qemu-thread-win32.c
+++ b/util/qemu-thread-win32.c
@@ -79,6 +79,31 @@ void qemu_mutex_unlock(QemuMutex *mutex)
LeaveCriticalSection(&mutex->lock);
}
+void qemu_rec_mutex_init(QemuRecMutex *mutex)
+{
+ InitializeCriticalSection(&mutex->lock);
+}
+
+void qemu_rec_mutex_destroy(QemuRecMutex *mutex)
+{
+ DeleteCriticalSection(&mutex->lock);
+}
+
+void qemu_rec_mutex_lock(QemuRecMutex *mutex)
+{
+ EnterCriticalSection(&mutex->lock);
+}
+
+int qemu_rec_mutex_trylock(QemuRecMutex *mutex)
+{
+ return !TryEnterCriticalSection(&mutex->lock);
+}
+
+void qemu_rec_mutex_unlock(QemuRecMutex *mutex)
+{
+ LeaveCriticalSection(&mutex->lock);
+}
+
void qemu_cond_init(QemuCond *cond)
{
memset(cond, 0, sizeof(*cond));
--
2.7.4
