libdill: Structured Concurrency for C


ipc_connect_mem - creates a connection to remote IPC endpoint


#include <libdill.h>

int ipc_connect_mem(
    const char* addr,
    void* mem,
    int64_t deadline);


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 creates a connection to a remote IPC endpoint.

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

addr: Filename to connect to.

mem: The memory to store the newly created object. It must be at least IPC_SIZE bytes long and 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.


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



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


brecv(3) brecvl(3) bsend(3) bsendl(3) hclose(3) ipc_accept(3) ipc_accept_mem(3) ipc_close(3) ipc_connect(3) ipc_listen(3) ipc_listen_mem(3) ipc_pair(3) ipc_pair_mem(3) now(3)