banan-os/libc/include/sys/msg.h

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#ifndef _SYS_MSG_H
#define _SYS_MSG_H 1
// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_msg.h.html
#include <sys/cdefs.h>
__BEGIN_DECLS
#define __need_pid_t
#define __need_size_t
#define __need_ssize_t
#define __need_time_t
#include <sys/types.h>
#include <sys/ipc.h>
typedef unsigned int msgqnum_t;
typedef unsigned int msglen_t;
#define MSG_NOERROR 0
struct msqid_ds
{
struct ipc_perm msg_perm; /* Operation permission structure. */
msgqnum_t msg_qnum; /* Number of messages currently on queue. */
msglen_t msg_qbytes; /* Maximum number of bytes allowed on queue. */
pid_t msg_lspid; /* Process ID of last msgsnd(). */
pid_t msg_lrpid; /* Process ID of last msgrcv(). */
time_t msg_stime; /* Time of last msgsnd(). */
time_t msg_rtime; /* Time of last msgrcv(). */
time_t msg_ctime; /* Time of last change. */
};
int msgctl(int msqid, int cmd, struct msqid_ds* buf);
int msgget(key_t key, int msgflg);
ssize_t msgrcv(int msqid, void* msgp, size_t msgsz, long msgtyp, int msgflg);
int msgsnd(int msqid, const void* msgp, size_t msgsz, int msgflg);
__END_DECLS
#endif