int aio_suspend(const struct aiocb * const list, int
const struct timespec *timeout);
The aio_suspend() function shall suspend the calling thread until at least one of the asynchronous I/O operations referenced by the list argument has completed, until a signal interrupts the function, or, if timeout is not NULL, until the time interval specified by timeout has passed. If any of the aiocb structures in the list correspond to completed asynchronous I/O operations (that is, the error status for the operation is not equal to [EINPROGRESS]) at the time of the call, the function shall return without suspending the calling thread. The list argument is an array of pointers to asynchronous I/O control blocks. The nent argument indicates the number of elements in the array. Each aiocb structure pointed to has been used in initiating an asynchronous I/O request via aio_read(), aio_write(), or lio_listio(). This array may contain NULL pointers, which are ignored. If this array contains pointers that refer to aiocb structures that have not been used in submitting asynchronous I/O, the effect is undefined.
If the time interval indicated in the timespec structure pointed to by timeout passes before any of the I/O operations referenced by list are completed, then aio_suspend() shall return with an error. If the Monotonic Clock option is supported, the clock that shall be used to measure this time interval shall be the CLOCK_MONOTONIC clock.
If the aio_suspend() function returns after one or more asynchronous I/O operations have completed, the function shall return zero. Otherwise, the function shall return a value of -1 and set errno to indicate the error.
The application may determine which asynchronous I/O completed by scanning the associated error and return status using aio_error() and aio_return(), respectively.
The aio_suspend() function shall fail if:
The following sections are informative.
The aio_suspend() function is part of the Asynchronous Input and Output option and need not be available on all implementations.
aio_read() , aio_write() , lio_listio() , the Base Definitions volume of IEEE Std 1003.1-2001, <aio.h>