diff mbox

[v3,3/5] Wrapper function to wait on condition for the main loop mutex

Message ID 150287475076.9760.5351022965446694044.stgit@aravinda
State New
Headers show

Commit Message

Aravinda Prasad Aug. 16, 2017, 9:12 a.m. UTC 
Introduce a wrapper function to wait on condition for
the main loop mutex. This function atomically releases
the main loop mutex and causes the calling thread to
block on the condition.

Signed-off-by: Aravinda Prasad <aravinda@linux.vnet.ibm.com>
---
 cpus.c                   |    5 +++++
 include/qemu/main-loop.h |    8 ++++++++
 2 files changed, 13 insertions(+)
diff mbox

Patch

diff --git a/cpus.c b/cpus.c
index 9bed61e..9712013 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1589,6 +1589,11 @@  void qemu_mutex_unlock_iothread(void)
     qemu_mutex_unlock(&qemu_global_mutex);
 }
 
+void qemu_cond_wait_iothread(QemuCond *cond)
+{
+    qemu_cond_wait(cond, &qemu_global_mutex);
+}
+
 static bool all_vcpus_paused(void)
 {
     CPUState *cpu;
diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h
index 6b4b60b..618cb2f 100644
--- a/include/qemu/main-loop.h
+++ b/include/qemu/main-loop.h
@@ -279,6 +279,14 @@  void qemu_mutex_lock_iothread(void);
  */
 void qemu_mutex_unlock_iothread(void);
 
+/**
+ * qemu_cond_wait_iothread: Wait on condition for the main loop mutex
+ *
+ * This function atomically releases the main loop mutex and causes
+ * the calling thread to block on the condition.
+ */
+void qemu_cond_wait_iothread(QemuCond *cond);
+
 /* internal interfaces */
 
 void qemu_fd_register(int fd);