commit 419ba9e2aadbfed3862d95265ce141d016c7ca69
author Tim Murray <timmurray@google.com> Fri Apr 13 10:15:49 2018 -0700
committer Elliott Hughes <enh@google.com> Wed Apr 25 14:30:37 2018 -0700
tree 6996e4e88788b0c769a8b8f48e9178435f0a1fe5
parent f88905d231367eeeb72379d9eb2debbadb47b788

cutils: add restricted cpuset

(cherrypick of 658ae90f699bd21ec8d79b18a34765ed5993c828 without the init.rc change)

Bug: 78197570
Test: CTS
Change-Id: I6df972950b75a839caa463ae282ad000b959e8ae

libcutils/sched_policy.cpp

diff --git a/libcutils/sched_policy.cpp b/libcutils/sched_policy.cpp
index f5ce82f..f72ec52 100644
--- a/libcutils/sched_policy.cpp
+++ b/libcutils/sched_policy.cpp
@@ -57,6 +57,7 @@
 static int bg_cpuset_fd = -1;
 static int fg_cpuset_fd = -1;
 static int ta_cpuset_fd = -1; // special cpuset for top app
+static int rs_cpuset_fd = -1;  // special cpuset for screen off restrictions
 
 // File descriptors open to /dev/stune/../tasks, setup by initialize, or -1 on error
 static int bg_schedboost_fd = -1;
@@ -151,6 +152,8 @@
             system_bg_cpuset_fd = open(filename, O_WRONLY | O_CLOEXEC);
             filename = "/dev/cpuset/top-app/tasks";
             ta_cpuset_fd = open(filename, O_WRONLY | O_CLOEXEC);
+            filename = "/dev/cpuset/restricted/tasks";
+            rs_cpuset_fd = open(filename, O_WRONLY | O_CLOEXEC);
 
             if (schedboost_enabled()) {
                 filename = "/dev/stune/top-app/tasks";
@@ -308,6 +311,9 @@
     case SP_SYSTEM:
         fd = system_bg_cpuset_fd;
         break;
+    case SP_RESTRICTED:
+        fd = rs_cpuset_fd;
+        break;
     default:
         boost_fd = fd = -1;
         break;
@@ -457,14 +463,10 @@
 const char *get_sched_policy_name(SchedPolicy policy)
 {
     policy = _policy(policy);
-    static const char * const strings[SP_CNT] = {
-       [SP_BACKGROUND] = "bg",
-       [SP_FOREGROUND] = "fg",
-       [SP_SYSTEM]     = "  ",
-       [SP_AUDIO_APP]  = "aa",
-       [SP_AUDIO_SYS]  = "as",
-       [SP_TOP_APP]    = "ta",
-       [SP_RT_APP]    = "rt",
+    static const char* const strings[SP_CNT] = {
+            [SP_BACKGROUND] = "bg", [SP_FOREGROUND] = "fg", [SP_SYSTEM] = "  ",
+            [SP_AUDIO_APP] = "aa",  [SP_AUDIO_SYS] = "as",  [SP_TOP_APP] = "ta",
+            [SP_RT_APP] = "rt",     [SP_RESTRICTED] = "rs",
     };
     if ((policy < SP_CNT) && (strings[policy] != NULL))
         return strings[policy];