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Acquire ownership of a file, without blocking
#include <stdio.h>
int ftrylockfile( FILE* file );
- file
- A pointer to the FILE object for the file you want to lock.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The ftrylockfile() function is used by a thread to
acquire ownership of a FILE if the object is
available; ftrylockfile() is a nonblocking version of
flockfile().
- 0
- Success.
- Nonzero
- The lock can't be acquired.
POSIX 1003.1 TSF
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
flockfile(),
getc_unlocked(),
getchar_unlocked(),
putc_unlocked(),
putchar_unlocked()
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