[Qemu-devel] [PATCH 4/5]: Implement qemu_thread_join function

[Stefan Berger <stefanb@linux.vnet.ibm.com>]

This patch provides support for 'joining a thread' by wrapping
pthread_join with qemu_thread_join.

Since the backend implementation is based on threads and I am stopping
and starting that thread during operations like 'snapshot resume', I
do use this functionality to synchronize with the TPM thread's termination
before terminating the TPM, creating a new one and loading previous state
from the time of the snapshot into the TPM.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>

---
 qemu-thread.c |    5 +++++
 qemu-thread.h |    1 +
 2 files changed, 6 insertions(+)

Index: qemu-git/qemu-thread.c
===================================================================
--- qemu-git.orig/qemu-thread.c
+++ qemu-git/qemu-thread.c
@@ -190,3 +190,8 @@ void qemu_thread_exit(void *retval)
 {
     pthread_exit(retval);
 }
+
+int qemu_thread_join(QemuThread *thread, void **retval)
+{
+    return pthread_join(thread->thread, retval);
+}
Index: qemu-git/qemu-thread.h
===================================================================
--- qemu-git.orig/qemu-thread.h
+++ qemu-git/qemu-thread.h
@@ -40,5 +40,6 @@ void qemu_thread_signal(QemuThread *thre
 void qemu_thread_self(QemuThread *thread);
 int qemu_thread_equal(QemuThread *thread1, QemuThread *thread2);
 void qemu_thread_exit(void *retval);
+int qemu_thread_join(QemuThread *thread, void **retval);
 
 #endif