libdill: Structured Concurrency for C

NAME

ipc_accept_mem - accepts an incoming IPC connection

SYNOPSIS

#include <libdill.h>

int ipc_accept_mem(
    int s,
    struct ipc_storage* mem,
    int64_t deadline);

DESCRIPTION

IPC protocol is a bytestream protocol for transporting data among processes on the same machine. It is an equivalent to POSIX AF_LOCAL sockets.

This function accepts an incoming IPC connection.

This function allows to avoid one dynamic memory allocation by storing the object in user-supplied memory. Unless you are hyper-optimizing use ipc_accept instead.

s: Socket created by ipc_listen.

mem: The structure to store the newly created object in. It must not be deallocated before the object is closed.

deadline: A point in time when the operation should time out, in milliseconds. Use the now function to get your current point in time. 0 means immediate timeout, i.e., perform the operation if possible or return without blocking if not. -1 means no deadline, i.e., the call will block forever if the operation cannot be performed.

The socket can be cleanly shut down using ipc_close function.

This function is not available if libdill is compiled with --disable-sockets option.

RETURN VALUE

In case of success the function returns handle of the new connection. In case of error it returns -1 and sets errno to one of the values below.

ERRORS

EBADF: Invalid handle.
ECANCELED: Current coroutine was canceled.
EMFILE: The maximum number of file descriptors in the process are already open.
ENFILE: The maximum number of file descriptors in the system are already open.
ENOMEM: Not enough memory.
ENOTSUP: The handle does not support this operation.
ETIMEDOUT: Deadline was reached.

EXAMPLE

int ls = ipc_listen("/tmp/test.ipc", 10);
int s = ipc_accept(ls, -1);
bsend(s, "ABC", 3, -1);
char buf[3];
brecv(s, buf, sizeof(buf), -1);
ipc_close(s);
ipc_close(ls);