Commit | Line | Data |
---|---|---|
7dfb7103 NC |
1 | /* Freezer declarations */ |
2 | ||
3 | #ifdef CONFIG_PM | |
4 | /* | |
5 | * Check if a process has been frozen | |
6 | */ | |
7 | static inline int frozen(struct task_struct *p) | |
8 | { | |
9 | return p->flags & PF_FROZEN; | |
10 | } | |
11 | ||
12 | /* | |
13 | * Check if there is a request to freeze a process | |
14 | */ | |
15 | static inline int freezing(struct task_struct *p) | |
16 | { | |
17 | return p->flags & PF_FREEZE; | |
18 | } | |
19 | ||
20 | /* | |
21 | * Request that a process be frozen | |
22 | * FIXME: SMP problem. We may not modify other process' flags! | |
23 | */ | |
24 | static inline void freeze(struct task_struct *p) | |
25 | { | |
26 | p->flags |= PF_FREEZE; | |
27 | } | |
28 | ||
29 | /* | |
30 | * Sometimes we may need to cancel the previous 'freeze' request | |
31 | */ | |
32 | static inline void do_not_freeze(struct task_struct *p) | |
33 | { | |
34 | p->flags &= ~PF_FREEZE; | |
35 | } | |
36 | ||
37 | /* | |
38 | * Wake up a frozen process | |
39 | */ | |
40 | static inline int thaw_process(struct task_struct *p) | |
41 | { | |
42 | if (frozen(p)) { | |
43 | p->flags &= ~PF_FROZEN; | |
44 | wake_up_process(p); | |
45 | return 1; | |
46 | } | |
47 | return 0; | |
48 | } | |
49 | ||
50 | /* | |
51 | * freezing is complete, mark process as frozen | |
52 | */ | |
53 | static inline void frozen_process(struct task_struct *p) | |
54 | { | |
55 | p->flags = (p->flags & ~PF_FREEZE) | PF_FROZEN; | |
56 | } | |
57 | ||
58 | extern void refrigerator(void); | |
59 | extern int freeze_processes(void); | |
a9b6f562 | 60 | extern void thaw_processes(void); |
7dfb7103 NC |
61 | |
62 | static inline int try_to_freeze(void) | |
63 | { | |
64 | if (freezing(current)) { | |
65 | refrigerator(); | |
66 | return 1; | |
67 | } else | |
68 | return 0; | |
69 | } | |
ff39593a NC |
70 | |
71 | extern void thaw_some_processes(int all); | |
72 | ||
7dfb7103 NC |
73 | #else |
74 | static inline int frozen(struct task_struct *p) { return 0; } | |
75 | static inline int freezing(struct task_struct *p) { return 0; } | |
76 | static inline void freeze(struct task_struct *p) { BUG(); } | |
77 | static inline int thaw_process(struct task_struct *p) { return 1; } | |
78 | static inline void frozen_process(struct task_struct *p) { BUG(); } | |
79 | ||
80 | static inline void refrigerator(void) {} | |
81 | static inline int freeze_processes(void) { BUG(); return 0; } | |
82 | static inline void thaw_processes(void) {} | |
83 | ||
84 | static inline int try_to_freeze(void) { return 0; } | |
85 | ||
86 | ||
87 | #endif |