1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
#include <errno.h>
#include <sys/msg.h>
#include "ipc.h"
#ifdef L_msgctl
#ifdef __NR_msgctl
#define __NR___libc_msgctl __NR_msgctl
static inline _syscall3(int, __libc_msgctl, int, msqid, int, cmd, struct msqid_ds *, buf);
#endif
/* Message queue control operation. */
int msgctl(int msqid, int cmd, struct msqid_ds *buf)
{
#ifdef __NR_msgctl
return __libc_msgctl(msqid, cmd | __IPC_64, buf);
#else
return __syscall_ipc(IPCOP_msgctl, msqid, cmd | __IPC_64, 0, buf);
#endif
}
#endif
#ifdef L_msgget
#ifdef __NR_msgget
_syscall2(int, msgget, key_t, key, int, msgflg)
#else
/* Get messages queue. */
int msgget (key_t key, int msgflg)
{
return __syscall_ipc(IPCOP_msgget ,key ,msgflg ,0 ,0);
}
#endif
#endif
struct new_msg_buf{
struct msgbuf * oldmsg;
long int r_msgtyp; /* the fifth arg of __syscall_ipc */
};
/* Receive message from message queue. */
#ifdef L_msgrcv
#ifdef __UCLIBC_HAS_THREADS_NATIVE__
#include <sysdep-cancel.h>
int
__libc_msgrcv (int msqid, void *msgp, size_t msgsz, long int msgtyp, int msgflg)
{
/* The problem here is that Linux' calling convention only allows up to
fives parameters to a system call. */
struct new_msg_buf tmp;
tmp.oldmsg = msgp;
tmp.r_msgtyp = msgtyp;
if (SINGLE_THREAD_P)
return INLINE_SYSCALL (ipc, 5, IPCOP_msgrcv, msqid, msgsz, msgflg,
__ptrvalue (&tmp));
int oldtype = LIBC_CANCEL_ASYNC ();
int result = INLINE_SYSCALL (ipc, 5, IPCOP_msgrcv, msqid, msgsz, msgflg,
__ptrvalue (&tmp));
LIBC_CANCEL_RESET (oldtype);
return result;
}
weak_alias(__libc_msgrcv, msgrcv)
#else
#ifdef __NR_msgrcv
_syscall5(int, msgrcv, int, msqid, void *, msgp, size_t, msgsz, long int, msgtyp, int, msgflg);
#else
int msgrcv (int msqid, void *msgp, size_t msgsz,
long int msgtyp, int msgflg)
{
struct new_msg_buf temp;
temp.r_msgtyp = msgtyp;
temp.oldmsg = msgp;
return __syscall_ipc(IPCOP_msgrcv ,msqid ,msgsz ,msgflg ,&temp);
}
#endif
#endif
#endif
#ifdef L_msgsnd
#ifdef __UCLIBC_HAS_THREADS_NATIVE__
#include <sysdep-cancel.h>
int
__libc_msgsnd (int msqid, const void *msgp, size_t msgsz, int msgflg)
{
if (SINGLE_THREAD_P)
return INLINE_SYSCALL (ipc, 5, IPCOP_msgsnd, msqid, msgsz,
msgflg, msgp);
int oldtype = LIBC_CANCEL_ASYNC ();
int result = INLINE_SYSCALL (ipc, 5, IPCOP_msgsnd, msqid, msgsz,
msgflg, msgp);
LIBC_CANCEL_RESET (oldtype);
return result;
}
weak_alias(__libc_msgsnd, msgsnd)
#else
#ifdef __NR_msgsnd
_syscall4(int, msgsnd, int, msqid, const void *, msgp, size_t, msgsz, int, msgflg);
#else
/* Send message to message queue. */
int msgsnd (int msqid, const void *msgp, size_t msgsz, int msgflg)
{
return __syscall_ipc(IPCOP_msgsnd, msqid, msgsz, msgflg, (void *)msgp);
}
#endif
#endif
#endif
|
