1 | /* libc/sys/linux/ipc.c - IPC semaphore and message queue functions */ |
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2 | |
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3 | /* Copyright 2002, Red Hat Inc. */ |
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4 | |
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5 | #include <sys/types.h> |
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6 | #include <sys/sem.h> |
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7 | #include <sys/msg.h> |
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8 | #include <stdarg.h> |
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9 | |
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10 | #include <machine/syscall.h> |
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11 | |
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12 | #define IPC_64 0x100 |
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13 | |
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14 | #define IPCOP_semop 1 |
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15 | #define IPCOP_semget 2 |
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16 | #define IPCOP_semctl 3 |
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17 | #define IPCOP_msgsnd 11 |
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18 | #define IPCOP_msgrcv 12 |
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19 | #define IPCOP_msgget 13 |
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20 | #define IPCOP_msgctl 14 |
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21 | |
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22 | static _syscall5(int,ipc,int,op,int,arg1,int,arg2,int,arg3,void *,arg4); |
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23 | |
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24 | int |
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25 | semget (key_t key, int nsems, int semflgs) |
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26 | { |
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27 | return __libc_ipc(IPCOP_semget, (int)key, nsems, semflgs, NULL); |
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28 | } |
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29 | |
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30 | int |
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31 | semctl (int semid, int semnum, int cmd, ...) |
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32 | { |
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33 | va_list va; |
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34 | union semun { |
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35 | int val; |
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36 | struct semid_ds *buf; |
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37 | unsigned short *array; |
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38 | } arg; |
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39 | |
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40 | va_start (va, cmd); |
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41 | |
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42 | arg = va_arg (va, union semun); |
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43 | |
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44 | va_end (va); |
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45 | |
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46 | return __libc_ipc(IPCOP_semctl, semid, semnum, cmd | IPC_64, &arg); |
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47 | } |
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48 | |
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49 | int |
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50 | semop (int semid, struct sembuf *sops, size_t nsems) |
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51 | { |
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52 | return __libc_ipc(IPCOP_semop, semid, (int)nsems, 0, sops); |
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53 | } |
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54 | |
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55 | int |
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56 | msgget (key_t key, int msgflg) |
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57 | { |
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58 | return __libc_ipc(IPCOP_msgget, (int)key, msgflg, 0, NULL); |
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59 | } |
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60 | |
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61 | int |
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62 | msgctl (int msqid, int cmd, struct msqid_ds *buf) |
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63 | { |
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64 | return __libc_ipc(IPCOP_msgctl, msqid, cmd | IPC_64, 0, buf); |
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65 | } |
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66 | |
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67 | int |
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68 | msgsnd (int msqid, const void *msgp, size_t msgsz, int msgflg) |
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69 | { |
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70 | return __libc_ipc(IPCOP_msgsnd, msqid, (int)msgsz, msgflg, (void *)msgp); |
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71 | } |
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72 | |
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73 | int |
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74 | msgrcv (int msqid, void *msgp, size_t msgsz, long int msgtyp, int msgflg) |
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75 | { |
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76 | /* last argument must contain multiple args */ |
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77 | struct { |
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78 | void *msgp; |
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79 | long int msgtyp; |
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80 | } args; |
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81 | |
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82 | args.msgp = msgp; |
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83 | args.msgtyp = msgtyp; |
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84 | |
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85 | return (ssize_t)__libc_ipc(IPCOP_msgrcv, msqid, (int)msgsz, msgflg, &args); |
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86 | } |
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87 | |
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