Merge "Add C++ thread API androidGetThreadSchedulingGroup" (940673f9) · Commits · e / os / platform_frameworks_native

include/utils/threads.h

+7 −0

Original line number	Original line	Diff line number	Diff line
	@@ -143,6 +143,13 @@ extern int androidSetThreadSchedulingGroup(pid_t tid, int grp);
	// in either case errno is set. Thread ID zero means current thread.		// in either case errno is set. Thread ID zero means current thread.
	extern int androidSetThreadPriority(pid_t tid, int prio);		extern int androidSetThreadPriority(pid_t tid, int prio);

			// Get the current scheduling group of a particular thread. Normally returns
			// one of the ANDROID_TGROUP constants other than ANDROID_TGROUP_DEFAULT.
			// Returns ANDROID_TGROUP_DEFAULT if no pthread support (e.g. on host) or if
			// scheduling groups are disabled. Returns INVALID_OPERATION if unexpected error.
			// Thread ID zero means current thread.
			extern int androidGetThreadSchedulingGroup(pid_t tid);

	#ifdef __cplusplus		#ifdef __cplusplus
	}		}
	#endif		#endif

+35 −0

Original line number	Original line	Diff line number	Diff line
	@@ -368,6 +368,41 @@ int androidSetThreadPriority(pid_t tid, int pri)
	return rc;		return rc;
	}		}

			int androidGetThreadSchedulingGroup(pid_t tid)
			{
			int ret = ANDROID_TGROUP_DEFAULT;

			#if defined(HAVE_PTHREADS)
			// convention is to not call get/set_sched_policy methods if disabled by property
			pthread_once(&gDoSchedulingGroupOnce, checkDoSchedulingGroup);
			if (gDoSchedulingGroup) {
			SchedPolicy policy;
			// get_sched_policy does not support tid == 0
			if (tid == 0) {
			tid = androidGetTid();
			}
			if (get_sched_policy(tid, &policy) < 0) {
			ret = INVALID_OPERATION;
			} else {
			switch (policy) {
			case SP_BACKGROUND:
			ret = ANDROID_TGROUP_BG_NONINTERACT;
			break;
			case SP_FOREGROUND:
			ret = ANDROID_TGROUP_FG_BOOST;
			break;
			default:
			// should not happen, as enum SchedPolicy does not have any other values
			ret = INVALID_OPERATION;
			break;
			}
			}
			}
			#endif

			return ret;
			}

	namespace android {		namespace android {

	/*		/*