Module coio

READ event

WRITE event

Wait until READ or WRITE event on socket (fd). Yields.

Parameters:

• fd (int) — non-blocking socket file description

• event (int) — requested events to wait. Combination of COIO_READ | COIO_WRITE bit flags.

• timeout (double) — timeout in seconds.

Returns

0 - timeout

Returns

0 - returned events. Combination of TNT_IO_READ | TNT_IO_WRITE bit flags.

Create new eio task with specified function and arguments. Yield and wait until the task is complete. This function may use the worker_pool_threads configuration parameter.

To avoid double error checking, this function does not throw exceptions. In most cases it is also necessary to check the return value of the called function and perform necessary actions. If func sets errno, the errno is preserved across the call.

Returns

-1 and errno = ENOMEM if failed to create a task

Returns

the function's return (errno is preserved).

Example:

 
static ssize_t openfile_cb(va_list ap){        const char* filename = va_arg(ap);        int flags = va_arg(ap);        return open(filename, flags);}if (coio_call(openfile_cb, "/tmp/file", 0) == -1)    // handle errors....

Fiber-friendly version of getaddrinfo(3).

Close the fd and wake any fiber blocked in coio_wait() call on this fd.

• fd (int) — non-blocking socket file description

Returns

the result of close(fd), see close(2)