Merge "Thread ID zero for androidSetThreadSchedulingGroup"
diff --git a/include/utils/threads.h b/include/utils/threads.h
index 0bd69cf..41f67e4 100644
--- a/include/utils/threads.h
+++ b/include/utils/threads.h
@@ -133,13 +133,13 @@
// Change the scheduling group of a particular thread. The group
// should be one of the ANDROID_TGROUP constants. Returns BAD_VALUE if
// grp is out of range, else another non-zero value with errno set if
-// the operation failed.
+// the operation failed. Thread ID zero means current thread.
extern int androidSetThreadSchedulingGroup(pid_t tid, int grp);
// Change the priority AND scheduling group of a particular thread. The priority
// should be one of the ANDROID_PRIORITY constants. Returns INVALID_OPERATION
// if the priority set failed, else another value if just the group set failed;
-// in either case errno is set.
+// in either case errno is set. Thread ID zero means current thread.
extern int androidSetThreadPriority(pid_t tid, int prio);
#ifdef __cplusplus
diff --git a/libs/utils/Threads.cpp b/libs/utils/Threads.cpp
index 15bb1d2..71352a8 100644
--- a/libs/utils/Threads.cpp
+++ b/libs/utils/Threads.cpp
@@ -316,6 +316,10 @@
#if defined(HAVE_PTHREADS)
pthread_once(&gDoSchedulingGroupOnce, checkDoSchedulingGroup);
if (gDoSchedulingGroup) {
+ // set_sched_policy does not support tid == 0
+ if (tid == 0) {
+ tid = androidGetTid();
+ }
if (set_sched_policy(tid, (grp == ANDROID_TGROUP_BG_NONINTERACT) ?
SP_BACKGROUND : SP_FOREGROUND)) {
return PERMISSION_DENIED;