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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [sys/] [linux/] [ipc.c] - Rev 262
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/* libc/sys/linux/ipc.c - IPC semaphore and message queue functions */ /* Copyright 2002, Red Hat Inc. */ #include <sys/types.h> #include <sys/sem.h> #include <sys/msg.h> #include <stdarg.h> #include <machine/syscall.h> #define IPC_64 0x100 #define IPCOP_semop 1 #define IPCOP_semget 2 #define IPCOP_semctl 3 #define IPCOP_msgsnd 11 #define IPCOP_msgrcv 12 #define IPCOP_msgget 13 #define IPCOP_msgctl 14 static _syscall5(int,ipc,int,op,int,arg1,int,arg2,int,arg3,void *,arg4); int semget (key_t key, int nsems, int semflgs) { return __libc_ipc(IPCOP_semget, (int)key, nsems, semflgs, NULL); } int semctl (int semid, int semnum, int cmd, ...) { va_list va; union semun { int val; struct semid_ds *buf; unsigned short *array; } arg; va_start (va, cmd); arg = va_arg (va, union semun); va_end (va); return __libc_ipc(IPCOP_semctl, semid, semnum, cmd | IPC_64, &arg); } int semop (int semid, struct sembuf *sops, size_t nsems) { return __libc_ipc(IPCOP_semop, semid, (int)nsems, 0, sops); } int msgget (key_t key, int msgflg) { return __libc_ipc(IPCOP_msgget, (int)key, msgflg, 0, NULL); } int msgctl (int msqid, int cmd, struct msqid_ds *buf) { return __libc_ipc(IPCOP_msgctl, msqid, cmd | IPC_64, 0, buf); } int msgsnd (int msqid, const void *msgp, size_t msgsz, int msgflg) { return __libc_ipc(IPCOP_msgsnd, msqid, (int)msgsz, msgflg, (void *)msgp); } int msgrcv (int msqid, void *msgp, size_t msgsz, long int msgtyp, int msgflg) { /* last argument must contain multiple args */ struct { void *msgp; long int msgtyp; } args; args.msgp = msgp; args.msgtyp = msgtyp; return (ssize_t)__libc_ipc(IPCOP_msgrcv, msqid, (int)msgsz, msgflg, &args); }
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