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CHMAKE_MEM(3) libdill Library Functions CHMAKE_MEM(3) NAME chmake_mem - creates a channel SYNOPSIS #include <libdill.h> int chmake_mem( struct chstorage* mem, int chv[2]); DESCRIPTION Creates a bidirectional channel. In case of success handles to the both sides of the channel will be returned in chv parameter. A channel is a synchronization primitive, not a container. It doesn't store any items. This function allows to avoid one dynamic memory allocation by storing the object in user-supplied memory. Unless you are hyper-optimizing use chmake instead. mem: The structure to store the newly created object in. It must not be deallocated before the object is closed. chv: Out parameter. Two handles to the opposite ends of the channel. RETURN VALUE In case of success the function returns 0. In case of error it returns -1 and sets errno to one of the values below. ERRORS • EMFILE: The maximum number of file descriptors in the process are al- ready open. • ENFILE: The maximum number of file descriptors in the system are al- ready open. • ENOMEM: Not enough memory. EXAMPLE int ch[2]; int rc = chmake(ch); if(rc == -1) { perror("Cannot create channel"); exit(1); } SEE ALSO chdone(3) chmake(3) choose(3) chrecv(3) chsend(3) hclose(3) libdill CHMAKE_MEM(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLE | SEE ALSO
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