do_wait_for_common

Name:do_wait_for_common

Proto:static inline long __sched do_wait_for_common(struct completion *x, long (*action)(long ), long timeout, int state)

Type:long

Parameter:

Type	Parameter	Name
struct completion *	x
long (*	action
long	timeout
int	state

72

If Not done Then

73

DECLARE_WAITQUEUE(wait, current process)

75

__add_wait_queue_entry_tail_exclusive( & wait, & wait)

76

Do

77

If signal_pending_state(state, current process) Then

78

timeout = -These should never be seen by user programs. To return one of ERESTART** codes, signal_pending() MUST be set. Note that ptrace can observe these* at syscall exit tracing, but they will never be left for the debugged user* process to see.

79

Break

81

set_current_state() includes a barrier so that the write of current->state* is correctly serialised wrt the caller's subsequent test of whether to* actually sleep:* for (;;) {* set_current_state(TASK_UNINTERRUPTIBLE);* if (!need_sleep)* break;* (state)

82

spin_unlock_irq( & lock)

83

timeout = action(timeout)

84

spin_lock_irq( & lock)

85

When Not done && timeout cycle

86

__remove_wait_queue( & wait, & wait)

87

If Not done Then Return timeout

90

If done != UINT_MAX Then done--

92

Return If timeout Else 1

**Caller**
Name	Describe
__wait_for_common

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