1 /* Freezer declarations */
3 #include <linux/sched.h>
7 * Check if a process has been frozen
9 static inline int frozen(struct task_struct
*p
)
11 return p
->flags
& PF_FROZEN
;
15 * Check if there is a request to freeze a process
17 static inline int freezing(struct task_struct
*p
)
19 return test_tsk_thread_flag(p
, TIF_FREEZE
);
23 * Request that a process be frozen
25 static inline void freeze(struct task_struct
*p
)
27 set_tsk_thread_flag(p
, TIF_FREEZE
);
31 * Sometimes we may need to cancel the previous 'freeze' request
33 static inline void do_not_freeze(struct task_struct
*p
)
35 clear_tsk_thread_flag(p
, TIF_FREEZE
);
39 * Wake up a frozen process
41 static inline int thaw_process(struct task_struct
*p
)
44 p
->flags
&= ~PF_FROZEN
;
52 * freezing is complete, mark process as frozen
54 static inline void frozen_process(struct task_struct
*p
)
56 p
->flags
|= PF_FROZEN
;
58 clear_tsk_thread_flag(p
, TIF_FREEZE
);
61 extern void refrigerator(void);
62 extern int freeze_processes(void);
63 extern void thaw_processes(void);
65 static inline int try_to_freeze(void)
67 if (freezing(current
)) {
74 extern void thaw_some_processes(int all
);
77 static inline int frozen(struct task_struct
*p
) { return 0; }
78 static inline int freezing(struct task_struct
*p
) { return 0; }
79 static inline void freeze(struct task_struct
*p
) { BUG(); }
80 static inline int thaw_process(struct task_struct
*p
) { return 1; }
81 static inline void frozen_process(struct task_struct
*p
) { BUG(); }
83 static inline void refrigerator(void) {}
84 static inline int freeze_processes(void) { BUG(); return 0; }
85 static inline void thaw_processes(void) {}
87 static inline int try_to_freeze(void) { return 0; }
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