[PATCH 4/8] cpus: Introduce qemu_cond_timedwait_iothread()

[Peter Xu <peterx@redhat.com>]

This is the sister function of qemu_cond_wait_iothread().  Use it at the only
place where we do cond_timedwait() on BQL.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 cpus.c                   | 9 +++++++--
 include/qemu/main-loop.h | 7 +++++++
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/cpus.c b/cpus.c
index 00f6e361af..263eddc8b0 100644
--- a/cpus.c
+++ b/cpus.c
@@ -726,8 +726,8 @@ static void cpu_throttle_thread(CPUState *cpu, run_on_cpu_data opaque)
     endtime_ns = qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + sleeptime_ns;
     while (sleeptime_ns > 0 && !cpu->stop) {
         if (sleeptime_ns > SCALE_MS) {
-            qemu_cond_timedwait(cpu->halt_cond, &qemu_global_mutex,
-                                sleeptime_ns / SCALE_MS);
+            qemu_cond_timedwait_iothread(cpu->halt_cond,
+                                         sleeptime_ns / SCALE_MS);
         } else {
             qemu_mutex_unlock_iothread();
             g_usleep(sleeptime_ns / SCALE_US);
@@ -1844,6 +1844,11 @@ void qemu_cond_wait_iothread(QemuCond *cond)
     qemu_cond_wait(cond, &qemu_global_mutex);
 }
 
+void qemu_cond_timedwait_iothread(QemuCond *cond, int ms)
+{
+    qemu_cond_timedwait(cond, &qemu_global_mutex, ms);
+}
+
 static bool all_vcpus_paused(void)
 {
     CPUState *cpu;
diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h
index a6d20b0719..a0e59c5563 100644
--- a/include/qemu/main-loop.h
+++ b/include/qemu/main-loop.h
@@ -303,6 +303,13 @@ void qemu_mutex_unlock_iothread(void);
  */
 void qemu_cond_wait_iothread(QemuCond *cond);
 
+/*
+ * qemu_cond_timedwait_iothread: Wait on condition for the main loop mutex
+ *
+ * This is the same as qemu_cond_wait_iothread() but allows a timeout.
+ */
+void qemu_cond_timedwait_iothread(QemuCond *cond, int ms);
+
 /* internal interfaces */
 
 void qemu_fd_register(int fd);
-- 
2.24.1