aio_suspend - wait for asynchronous I/O operation or timeout
#include <aio.h> int aio_suspend(const struct aiocb * const aiocb_list, int nitems, const struct timespec *timeout); Link with -lrt.
The aio_suspend() function suspends the calling thread until one of the following occurs:
One or more of the asynchronous I/O requests in the list
aiocb_list has completed.
A signal is delivered.
timeout is not NULL and the specified time interval has passed. (For details of the
timespec structure, see nanosleep(2).)
nitems argument specifies the number of items in
aiocb_list. Each item in the list pointed to by
aiocb_list must be either NULL (and then is ignored), or a pointer to a control block on which I/O was initiated using aio_read(3), aio_write(3), or lio_listio(3). (See aio(7) for a description of the
If CLOCK_MONOTONIC is supported, this clock is used to measure the timeout interval (see clock_gettime(3)).
If this function returns after completion of one of the I/O requests specified in
aiocb_list, 0 is returned. Otherwise, -1 is returned, and
errno is set to indicate the error.
The aio_suspend() function is available since glibc 2.1.
One can achieve polling by using a non-NULL
timeout that specifies a zero time interval.
If one or more of the asynchronous I/O operations specified in
aiocb_list has already completed at the time of the call to aio_suspend(), then the call returns immediately.
The glibc implementation of aio_suspend() is not async-signal-safe, in violation of the requirements of POSIX.1.
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