Root/target/linux/goldfish/patches-2.6.30/0064-PM-Add-wake-lock-api.patch

1From e93bd714c424d9fe907cb1d8ec5ce784767a3b16 Mon Sep 17 00:00:00 2001
2From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com>
3Date: Fri, 26 Sep 2008 22:10:56 -0700
4Subject: [PATCH 064/134] PM: Add wake lock api.
5
6---
7 include/linux/wakelock.h | 91 ++++++++++++++++++++++++++++++++++++++++++++++
8 1 files changed, 91 insertions(+), 0 deletions(-)
9 create mode 100755 include/linux/wakelock.h
10
11--- /dev/null
12+++ b/include/linux/wakelock.h
13@@ -0,0 +1,91 @@
14+/* include/linux/wakelock.h
15+ *
16+ * Copyright (C) 2007-2008 Google, Inc.
17+ *
18+ * This software is licensed under the terms of the GNU General Public
19+ * License version 2, as published by the Free Software Foundation, and
20+ * may be copied, distributed, and modified under those terms.
21+ *
22+ * This program is distributed in the hope that it will be useful,
23+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
24+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25+ * GNU General Public License for more details.
26+ *
27+ */
28+
29+#ifndef _LINUX_WAKELOCK_H
30+#define _LINUX_WAKELOCK_H
31+
32+#include <linux/list.h>
33+#include <linux/ktime.h>
34+
35+/* A wake_lock prevents the system from entering suspend or other low power
36+ * states when active. If the type is set to WAKE_LOCK_SUSPEND, the wake_lock
37+ * prevents a full system suspend. If the type is WAKE_LOCK_IDLE, low power
38+ * states that cause large interrupt latencies or that disable a set of
39+ * interrupts will not entered from idle until the wake_locks are released.
40+ */
41+
42+enum {
43+ WAKE_LOCK_SUSPEND, /* Prevent suspend */
44+ WAKE_LOCK_IDLE, /* Prevent low power idle */
45+ WAKE_LOCK_TYPE_COUNT
46+};
47+
48+struct wake_lock {
49+#ifdef CONFIG_HAS_WAKELOCK
50+ struct list_head link;
51+ int flags;
52+ const char *name;
53+ unsigned long expires;
54+#ifdef CONFIG_WAKELOCK_STAT
55+ struct {
56+ int count;
57+ int expire_count;
58+ int wakeup_count;
59+ ktime_t total_time;
60+ ktime_t prevent_suspend_time;
61+ ktime_t max_time;
62+ ktime_t last_time;
63+ } stat;
64+#endif
65+#endif
66+};
67+
68+#ifdef CONFIG_HAS_WAKELOCK
69+
70+void wake_lock_init(struct wake_lock *lock, int type, const char *name);
71+void wake_lock_destroy(struct wake_lock *lock);
72+void wake_lock(struct wake_lock *lock);
73+void wake_lock_timeout(struct wake_lock *lock, long timeout);
74+void wake_unlock(struct wake_lock *lock);
75+
76+/* wake_lock_active returns a non-zero value if the wake_lock is currently
77+ * locked. If the wake_lock has a timeout, it does not check the timeout
78+ * but if the timeout had aready been checked it will return 0.
79+ */
80+int wake_lock_active(struct wake_lock *lock);
81+
82+/* has_wake_lock returns 0 if no wake locks of the specified type are active,
83+ * and non-zero if one or more wake locks are held. Specifically it returns
84+ * -1 if one or more wake locks with no timeout are active or the
85+ * number of jiffies until all active wake locks time out.
86+ */
87+long has_wake_lock(int type);
88+
89+#else
90+
91+static inline void wake_lock_init(struct wake_lock *lock, int type,
92+ const char *name) {}
93+static inline void wake_lock_destroy(struct wake_lock *lock) {}
94+static inline void wake_lock(struct wake_lock *lock) {}
95+static inline void wake_lock_timeout(struct wake_lock *lock, long timeout) {}
96+static inline void wake_unlock(struct wake_lock *lock) {}
97+
98+static inline int wake_lock_active(struct wake_lock *lock) { return 0; }
99+static inline long has_wake_lock(int type) { return 0; }
100+
101+#endif
102+
103+#endif
104+
105

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