From: Jan Kiszka <jan.kis...@siemens.com>
Allow to control if a QEMU thread is created joinable or not. Make it
not joinable by default to avoid that we keep the associated resources
around when terminating a thread without joining it (what we couldn't do
so far for obvious reasons).
The audio subsystem will need the join feature when converting it to
QEMU threading/locking abstractions, so provide that service.
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
qemu-thread-posix.c | 28 ++++++++++++++++++++++++++++--
1 files changed, 26 insertions(+), 2 deletions(-)
diff --git a/qemu-thread-posix.c b/qemu-thread-posix.c
index 49d3388..603ff3d 100644
--- a/qemu-thread-posix.c
+++ b/qemu-thread-posix.c
@@ -122,16 +122,28 @@ void qemu_thread_create(QemuThread *thread,
sigset_t set, oldset;
int err;
- assert(mode == QEMU_THREAD_DETACHED);
+ pthread_attr_t attr;
+ err = pthread_attr_init(&attr);
+ if (err) {
+ error_exit(err, __func__);
+ }
+ if (mode == QEMU_THREAD_DETACHED) {
+ err = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+ if (err) {
+ error_exit(err, __func__);
+ }
+ }
/* Leave signal handling to the iothread. */
sigfillset(&set);
pthread_sigmask(SIG_SETMASK, &set, &oldset);
- err = pthread_create(&thread->thread, NULL, start_routine, arg);
+ err = pthread_create(&thread->thread, &attr, start_routine, arg);
if (err)
error_exit(err, __func__);
pthread_sigmask(SIG_SETMASK, &oldset, NULL);
+
+ pthread_attr_destroy(&attr);
}
void qemu_thread_get_self(QemuThread *thread)
@@ -148,3 +162,15 @@ void qemu_thread_exit(void *retval)
{
pthread_exit(retval);
}
+
+void *qemu_thread_join(QemuThread *thread)
+{
+ int err;
+ void *ret;
+
+ err = pthread_join(thread->thread, &ret);
+ if (err) {
+ error_exit(err, __func__);
+ }
+ return ret;
+}
--
1.7.7.1
