Merge "cutils: str_parms: when deleting entry, need to also remove key"
diff --git a/include/cutils/sched_policy.h b/include/cutils/sched_policy.h
index eaf3993..753a08c 100644
--- a/include/cutils/sched_policy.h
+++ b/include/cutils/sched_policy.h
@@ -24,11 +24,28 @@
 typedef enum {
     SP_BACKGROUND = 0,
     SP_FOREGROUND = 1,
+    SP_CNT,
+    SP_MAX        = SP_CNT - 1,
 } SchedPolicy;
 
+/* Assign thread tid to the cgroup associated with the specified policy.
+ * If the thread is a thread group leader, that is it's gettid() == getpid(),
+ * then the other threads in the same thread group are _not_ affected.
+ * Return value: 0 for success, or -errno for error.
+ */
 extern int set_sched_policy(int tid, SchedPolicy policy);
+
+/* Return the policy associated with the cgroup of thread tid via policy pointer.
+ * Return value: 0 for success, or -1 for error and set errno.
+ */
 extern int get_sched_policy(int tid, SchedPolicy *policy);
 
+/* Return a displayable string corresponding to policy.
+ * Return value: non-NULL NUL-terminated name of unspecified length;
+ * the caller is responsible for displaying the useful part of the string.
+ */
+extern const char *get_sched_policy_name(SchedPolicy policy);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/system/audio.h b/include/system/audio.h
index 0980319..0276231 100644
--- a/include/system/audio.h
+++ b/include/system/audio.h
@@ -384,7 +384,7 @@
         return false;
 }
 
-/* Derive a channel mask from a channel count.
+/* Derive an output channel mask from a channel count.
  * This is to be used when the content channel mask is unknown. The 1, 2, 4, 5, 6, 7 and 8 channel
  * cases are mapped to the standard game/home-theater layouts, but note that 4 is mapped to quad,
  * and not stereo + FC + mono surround. A channel count of 3 is arbitrarily mapped to stereo + FC
@@ -392,7 +392,7 @@
  * Returns the matching channel mask, or 0 if the number of channels exceeds that of the
  * configurations for which a default channel mask is defined.
  */
-static inline audio_channel_mask_t audio_channel_mask_from_count(uint32_t channel_count)
+static inline audio_channel_mask_t audio_channel_out_mask_from_count(uint32_t channel_count)
 {
     switch(channel_count) {
     case 1:
@@ -416,6 +416,19 @@
     }
 }
 
+/* Similar to above, but for input.  Currently handles only mono and stereo. */
+static inline audio_channel_mask_t audio_channel_in_mask_from_count(uint32_t channel_count)
+{
+    switch (channel_count) {
+    case 1:
+        return AUDIO_CHANNEL_IN_MONO;
+    case 2:
+        return AUDIO_CHANNEL_IN_STEREO;
+    default:
+        return 0;
+    }
+}
+
 static inline bool audio_is_valid_format(audio_format_t format)
 {
     switch (format & AUDIO_FORMAT_MAIN_MASK) {
@@ -447,18 +460,18 @@
     size_t size = 0;
 
     switch (format) {
-        case AUDIO_FORMAT_PCM_32_BIT:
-        case AUDIO_FORMAT_PCM_8_24_BIT:
-            size = sizeof(int32_t);
-            break;
-        case AUDIO_FORMAT_PCM_16_BIT:
-            size = sizeof(int16_t);
-            break;
-        case AUDIO_FORMAT_PCM_8_BIT:
-            size = sizeof(uint8_t);
-            break;
-        default:
-            break;
+    case AUDIO_FORMAT_PCM_32_BIT:
+    case AUDIO_FORMAT_PCM_8_24_BIT:
+        size = sizeof(int32_t);
+        break;
+    case AUDIO_FORMAT_PCM_16_BIT:
+        size = sizeof(int16_t);
+        break;
+    case AUDIO_FORMAT_PCM_8_BIT:
+        size = sizeof(uint8_t);
+        break;
+    default:
+        break;
     }
     return size;
 }
diff --git a/include/system/camera.h b/include/system/camera.h
index 62167cf..b8389b1 100644
--- a/include/system/camera.h
+++ b/include/system/camera.h
@@ -151,11 +151,30 @@
      * arg1 = 0 will disable, while passing arg1 = 1 will enable the callback.
      */
     CAMERA_CMD_ENABLE_FOCUS_MOVE_MSG = 8,
+
+    /**
+     * Ping camera service to see if camera hardware is released.
+     *
+     * When any camera method returns error, the client can use ping command
+     * to see if the camera has been taken away by other clients. If the result
+     * is NO_ERROR, it means the camera hardware is not released. If the result
+     * is not NO_ERROR, the camera has been released and the existing client
+     * can silently finish itself or show a dialog.
+     */
+    CAMERA_CMD_PING = 9,
 };
 
 /** camera fatal errors */
 enum {
     CAMERA_ERROR_UNKNOWN = 1,
+    /**
+     * Camera was released because another client has connected to the camera.
+     * The original client should call Camera::disconnect immediately after
+     * getting this notification. Otherwise, the camera will be released by
+     * camera service in a short time. The client should not call any method
+     * (except disconnect and sending CAMERA_CMD_PING) after getting this.
+     */
+    CAMERA_ERROR_RELEASED = 2,
     CAMERA_ERROR_SERVER_DIED = 100
 };
 
diff --git a/libcutils/sched_policy.c b/libcutils/sched_policy.c
index f9c111e..35d362a 100644
--- a/libcutils/sched_policy.c
+++ b/libcutils/sched_policy.c
@@ -273,5 +273,17 @@
     return 0;
 }
 
+const char *get_sched_policy_name(SchedPolicy policy)
+{
+    static const char * const strings[SP_CNT] = {
+       [SP_BACKGROUND] = "bg",
+       [SP_FOREGROUND] = "fg",
+    };
+    if ((policy < SP_CNT) && (strings[policy] != NULL))
+        return strings[policy];
+    else
+        return "error";
+}
+
 #endif /* HAVE_PTHREADS */
 #endif /* HAVE_SCHED_H */
diff --git a/toolbox/ps.c b/toolbox/ps.c
index 7c3de4a..7c35ccb 100644
--- a/toolbox/ps.c
+++ b/toolbox/ps.c
@@ -167,14 +167,8 @@
             SchedPolicy p;
             if (get_sched_policy(pid, &p) < 0)
                 printf(" un ");
-            else {
-                if (p == SP_BACKGROUND)
-                    printf(" bg ");
-                else if (p == SP_FOREGROUND)
-                    printf(" fg ");
-                else
-                    printf(" er ");
-            }
+            else
+                printf(" %.2s ", get_sched_policy_name(p));
         }
         printf(" %08x %08x %s %s", wchan, eip, state, cmdline[0] ? cmdline : name);
         if(display_flags&SHOW_TIME)
diff --git a/toolbox/top.c b/toolbox/top.c
index 999c8e1..7642522 100644
--- a/toolbox/top.c
+++ b/toolbox/top.c
@@ -48,6 +48,7 @@
 
 #define PROC_NAME_LEN 64
 #define THREAD_NAME_LEN 32
+#define POLICY_NAME_LEN 4
 
 struct proc_info {
     struct proc_info *next;
@@ -67,7 +68,7 @@
     long rss;
     int prs;
     int num_threads;
-    char policy[32];
+    char policy[POLICY_NAME_LEN];
 };
 
 struct proc_list {
@@ -381,14 +382,10 @@
 static void read_policy(int pid, struct proc_info *proc) {
     SchedPolicy p;
     if (get_sched_policy(pid, &p) < 0)
-        strcpy(proc->policy, "unk");
+        strlcpy(proc->policy, "unk", POLICY_NAME_LEN);
     else {
-        if (p == SP_BACKGROUND)
-            strcpy(proc->policy, "bg");
-        else if (p == SP_FOREGROUND)
-            strcpy(proc->policy, "fg");
-        else
-            strcpy(proc->policy, "er");
+        strlcpy(proc->policy, get_sched_policy_name(p), POLICY_NAME_LEN);
+        proc->policy[2] = '\0';
     }
 }