Adds a parameter to the wakeup_callback to report sucessful wakeup or suspend aborts.

Adds the call to wakeup_callback when the write to the /sys/power/state
fails. This will help userspace account for the suspend aborts.

Bug: 17478088
Bug: 18179405
Change-Id: Icd1194cfbaf61044ca0b2fe63a10a4c52e1535bc

2 files changed, 15 insertions, 11 deletions

diff --git a/libsuspend/autosuspend_wakeup_count.c b/libsuspend/autosuspend_wakeup_count.c
index ee4ebe7..23a0290 100644
--- a/libsuspend/autosuspend_wakeup_count.c
+++ b/libsuspend/autosuspend_wakeup_count.c
@@ -19,6 +19,7 @@
 #include <pthread.h>
 #include <semaphore.h>
 #include <stddef.h>
+#include <stdbool.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/types.h>
@@ -38,7 +39,7 @@ static int wakeup_count_fd;
 static pthread_t suspend_thread;
 static sem_t suspend_lockout;
 static const char *sleep_state = "mem";
-static void (*wakeup_func)(void) = NULL;
+static void (*wakeup_func)(bool success) = NULL;
 
 static void *suspend_thread_func(void *arg __attribute__((unused)))
 {
@@ -46,6 +47,7 @@ static void *suspend_thread_func(void *arg __attribute__((unused)))
     char wakeup_count[20];
     int wakeup_count_len;
     int ret;
+    bool success;
 
     while (1) {
         usleep(100000);
@@ -72,6 +74,7 @@ static void *suspend_thread_func(void *arg __attribute__((unused)))
             continue;
         }
 
+        success = true;
         ALOGV("%s: write %*s to wakeup_count\n", __func__, wakeup_count_len, wakeup_count);
         ret = TEMP_FAILURE_RETRY(write(wakeup_count_fd, wakeup_count, wakeup_count_len));
         if (ret < 0) {
@@ -81,13 +84,11 @@ static void *suspend_thread_func(void *arg __attribute__((unused)))
             ALOGV("%s: write %s to %s\n", __func__, sleep_state, SYS_POWER_STATE);
             ret = TEMP_FAILURE_RETRY(write(state_fd, sleep_state, strlen(sleep_state)));
             if (ret < 0) {
-                strerror_r(errno, buf, sizeof(buf));
-                ALOGE("Error writing to %s: %s\n", SYS_POWER_STATE, buf);
-            } else {
-                void (*func)(void) = wakeup_func;
-                if (func != NULL) {
-                    (*func)();
-                }
+                success = false;
+            }
+            void (*func)(bool success) = wakeup_func;
+            if (func != NULL) {
+                (*func)(success);
             }
         }
 
@@ -139,7 +140,7 @@ static int autosuspend_wakeup_count_disable(void)
     return ret;
 }
 
-void set_wakeup_callback(void (*func)(void))
+void set_wakeup_callback(void (*func)(bool success))
 {
     if (wakeup_func != NULL) {
         ALOGE("Duplicate wakeup callback applied, keeping original");
diff --git a/libsuspend/include/suspend/autosuspend.h b/libsuspend/include/suspend/autosuspend.h
index 10e3d27..59188a8 100644
--- a/libsuspend/include/suspend/autosuspend.h
+++ b/libsuspend/include/suspend/autosuspend.h
@@ -18,6 +18,7 @@
 #define _LIBSUSPEND_AUTOSUSPEND_H_
 
 #include <sys/cdefs.h>
+#include <stdbool.h>
 
 __BEGIN_DECLS
 
@@ -46,9 +47,11 @@ int autosuspend_disable(void);
 /*
  * set_wakeup_callback
  *
- * Set a function to be called each time the device wakes up from suspend.
+ * Set a function to be called each time the device returns from suspend.
+ * success is true if the suspend was sucessful and false if the suspend
+ * aborted due to some reason.
  */
-void set_wakeup_callback(void (*func)(void));
+void set_wakeup_callback(void (*func)(bool success));
 
 __END_DECLS