From 21f580d9efc9f56df1a1421e510660142e26b43c Mon Sep 17 00:00:00 2001
From: David Anderson <davea@ssl.berkeley.edu>
Date: Fri, 8 Feb 2013 13:49:44 -0800
Subject: [PATCH] - client (Android): suspend processing if battery temperature
 > 45 C.     We can adjust this or make it configurable later.

---
 client/cs_prefs.cpp      | 14 ++++++++++----
 client/hostinfo_unix.cpp | 13 ++++++++++++-
 lib/hostinfo.h           |  1 +
 3 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/client/cs_prefs.cpp b/client/cs_prefs.cpp
index 159ed18ccd..46066dfc7a 100644
--- a/client/cs_prefs.cpp
+++ b/client/cs_prefs.cpp
@@ -268,6 +268,16 @@ int CLIENT_STATE::check_suspend_processing() {
     }
 
 #ifdef ANDROID
+    // check for hot battery
+    //
+    host_info.get_battery_status();
+    if (host_info.battery_state == BATTERY_STATE_OVERHEATED) {
+        return SUSPEND_REASON_BATTERY_OVERHEATED;
+    }
+    if (host_info.battery_temperature_celsius > 45) {
+        return SUSPEND_REASON_BATTERY_OVERHEATED;
+    }
+
     // on some devices, running jobs can drain the battery even
     // while it's recharging.
     // So use the following hysteresis policy:
@@ -276,10 +286,6 @@ int CLIENT_STATE::check_suspend_processing() {
     // Repeat.
     //
     static bool hyst_state = true;
-    host_info.get_battery_status();
-    if (host_info.battery_state == BATTERY_STATE_OVERHEATED) {
-        return SUSPEND_REASON_BATTERY_OVERHEATED;
-    }
     int cp = host_info.battery_charge_pct;
     if (cp >= 0) {
         if (cp < 90) {
diff --git a/client/hostinfo_unix.cpp b/client/hostinfo_unix.cpp
index e11dfb41a3..cba4d52463 100644
--- a/client/hostinfo_unix.cpp
+++ b/client/hostinfo_unix.cpp
@@ -446,7 +446,7 @@ bool HOST_INFO::host_is_running_on_batteries() {
 }
 
 #ifdef ANDROID
-// Get battery state and charge percentage
+// Get battery state, charge percentage, and temperature
 //
 void HOST_INFO::get_battery_status() {
     char msg[1024];
@@ -495,6 +495,17 @@ void HOST_INFO::get_battery_status() {
         LOGD("battery is charging");
         battery_state = BATTERY_STATE_CHARGING;
     }
+
+    battery_temperature_celsius = 0;
+    f = fopen("/sys/class/power_supply/battery/batt_temp", "r");
+    if (!f) {
+        f = fopen("/sys/class/power_supply/battery/temp", "r");
+    }
+    if (f) {
+        fscanf(f, "%d", &battery_temperature_celsius);
+        battery_temperature_celsius /= 10;
+        fclose(f);
+    }
 }
 #endif
 
diff --git a/lib/hostinfo.h b/lib/hostinfo.h
index f1fdadc6a6..898307f289 100644
--- a/lib/hostinfo.h
+++ b/lib/hostinfo.h
@@ -70,6 +70,7 @@ public:
 #ifdef ANDROID
     int battery_charge_pct;
     int battery_state;
+    int battery_temperature_celsius;
     void get_battery_status();
 #endif