add win32 qemu-thread implementation

For now, qemu_cond_timedwait and qemu_mutex_timedlock are left as
POSIX-only functions.  They can be removed later, once the patches
that remove their uses are in.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

1 files changed, 12 insertions, 15 deletions

diff --git a/qemu-thread.h b/qemu-thread.h
index add97bf10a..acdb6b2339 100644
--- a/qemu-thread.h
+++ b/qemu-thread.h
@@ -1,24 +1,16 @@
 #ifndef __QEMU_THREAD_H
 #define __QEMU_THREAD_H 1
-#include "semaphore.h"
-#include "pthread.h"
-
-struct QemuMutex {
-    pthread_mutex_t lock;
-};
-
-struct QemuCond {
-    pthread_cond_t cond;
-};
-
-struct QemuThread {
-    pthread_t thread;
-};
 
 typedef struct QemuMutex QemuMutex;
 typedef struct QemuCond QemuCond;
 typedef struct QemuThread QemuThread;
 
+#ifdef _WIN32
+#include "qemu-thread-win32.h"
+#else
+#include "qemu-thread-posix.h"
+#endif
+
 void qemu_mutex_init(QemuMutex *mutex);
 void qemu_mutex_destroy(QemuMutex *mutex);
 void qemu_mutex_lock(QemuMutex *mutex);
@@ -28,6 +20,12 @@ void qemu_mutex_unlock(QemuMutex *mutex);
 
 void qemu_cond_init(QemuCond *cond);
 void qemu_cond_destroy(QemuCond *cond);
+
+/*
+ * IMPORTANT: The implementation does not guarantee that pthread_cond_signal
+ * and pthread_cond_broadcast can be called except while the same mutex is
+ * held as in the corresponding pthread_cond_wait calls!
+ */
 void qemu_cond_signal(QemuCond *cond);
 void qemu_cond_broadcast(QemuCond *cond);
 void qemu_cond_wait(QemuCond *cond, QemuMutex *mutex);
@@ -36,7 +34,6 @@ int qemu_cond_timedwait(QemuCond *cond, QemuMutex *mutex, uint64_t msecs);
 void qemu_thread_create(QemuThread *thread,
                        void *(*start_routine)(void*),
                        void *arg);
-void qemu_thread_signal(QemuThread *thread, int sig);
 void qemu_thread_get_self(QemuThread *thread);
 int qemu_thread_is_self(QemuThread *thread);
 void qemu_thread_exit(void *retval);