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Thread ID zero for androidSetThreadSchedulingGroup

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Already implemented by androidSetThreadPriority but not documented

Change-Id: I85302b17092952065f3f3a4214d8d8abdd465dbd
This commit is contained in:
Glenn Kasten 2011-06-22 17:42:23 -07:00
parent d80fa1aa39
commit ce63396eff
2 changed files with 6 additions and 2 deletions
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4
include/utils/threads.h
View File

@ -133,13 +133,13 @@ extern pid_t androidGetTid();
// 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

4
libs/utils/Threads.cpp
View File

@ -316,6 +316,10 @@ int androidSetThreadSchedulingGroup(pid_t tid, int grp)
#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;