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Annotated edit history of SDL_SemWait(3) version 2, including all changes. View license author blame.
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2 perry 1 SDL_!SemWait
2 !!!SDL_!SemWait
1 perry 3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 RETURN VALUE
7 EXAMPLES
8 SEE ALSO
9 ----
10 !!NAME
11
12
2 perry 13 SDL_!SemWait- Lock a semaphore and suspend the thread if the semaphore value is zero.
1 perry 14 !!SYNOPSIS
15
16
17 __#include
18 __
19
20
2 perry 21 __int SDL_!SemWait__(__SDL_sem *sem__);
1 perry 22 !!DESCRIPTION
23
24
2 perry 25 __SDL_!SemWait()__ suspends the calling thread until
1 perry 26 either the semaphore pointed to by __sem__ has a positive
27 value, the call is interrupted by a signal or error. If the
28 call is successful it will atomically decrement the
29 semaphore value.
30
31
2 perry 32 After __SDL_!SemWait()__ is successful, the semaphore can
1 perry 33 be released and its count atomically incremented by a
2 perry 34 successful call to ''SDL_!SemPost''.
1 perry 35 !!RETURN VALUE
36
37
38 Returns __0__ if successful or __-1__ if there was an
39 error (leaving the semaphore unchanged).
40 !!EXAMPLES
41
42
2 perry 43 if (SDL_!SemWait(my_sem) == -1) {
1 perry 44 return WAIT_FAILED;
45 }
46 ...
2 perry 47 SDL_!SemPost(my_sem);
1 perry 48 !!SEE ALSO
49
50
2 perry 51 __SDL_!CreateSemaphore__, __SDL_!DestroySemaphore__,
52 __SDL_!SemTryWait__, __SDL_!SemWaitTimeout__,
53 __SDL_!SemPost__, __SDL_!SemValue__
1 perry 54 ----
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