These are already present in the Win32 implementation, add them to
the pthread wrappers as well.  Use PTHREAD_MUTEX_ERRORCHECK for mutex
operations. Later we'll add tracking of the owner for cond_signal/broadcast.

Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
 qemu-thread-posix.c |   23 ++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/qemu-thread-posix.c b/qemu-thread-posix.c
index e307773..a4c6e25 100644
--- a/qemu-thread-posix.c
+++ b/qemu-thread-posix.c
@@ -28,8 +31,12 @@ static void error_exit(int err, const char *msg)
 void qemu_mutex_init(QemuMutex *mutex)
 {
     int err;
+    pthread_mutexattr_t mutexattr;
 
-    err = pthread_mutex_init(&mutex->lock, NULL);
+    pthread_mutexattr_init(&mutexattr);
+    pthread_mutexattr_settype(&mutexattr, PTHREAD_MUTEX_ERRORCHECK);
+    err = pthread_mutex_init(&mutex->lock, &mutexattr);
+    pthread_mutexattr_destroy(&mutexattr);
     if (err)
         error_exit(err, __func__);
 }
-- 
1.7.4


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