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[/] [c0or1k/] [trunk/] [conts/] [posix/] [libposix/] [shm.c] - Blame information for rev 2

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/*
 * This is the glue logic between posix shared memory functions
 * and their L4 implementation.
 *
 * Copyright (C) 2007, 2008 Bahadir Balban
 */
#include <errno.h>
#include <stdio.h>
#include <sys/shm.h>
#include <sys/types.h>
#include <l4lib/ipcdefs.h>
#include <l4/macros.h>
#include <libposix.h>
 
int l4_shmget(l4id_t key, int size, int shmflg)
{
        int err;
 
        write_mr(L4SYS_ARG0, key);
        write_mr(L4SYS_ARG1, size);
        write_mr(L4SYS_ARG2, shmflg);
 
        /* Call pager with shmget() request. Check ipc error. */
        if ((err = l4_sendrecv(pagerid, pagerid, L4_IPC_TAG_SHMGET)) < 0) {
                print_err("%s: L4 IPC Error: %d.\n", __FUNCTION__, err);
                return err;
        }
        /* Check if syscall itself was successful */
        if (IS_ERR(err = l4_get_retval())) {
                print_err("%s: SHMGET Error: %d.\n", __FUNCTION__, err);
                return err;
        }
 
        /* Otherwise err has the positive id number */
        return err;
}
 
void *l4_shmat(l4id_t shmid, const void *shmaddr, int shmflg)
{
        int err;
 
        write_mr(L4SYS_ARG0, shmid);
        write_mr(L4SYS_ARG1, (unsigned long)shmaddr);
        write_mr(L4SYS_ARG2, shmflg);
 
        /* Call pager with shmget() request. Check ipc error. */
        if ((err = l4_sendrecv(pagerid, pagerid, L4_IPC_TAG_SHMAT)) < 0) {
                print_err("%s: L4 IPC Error: %d.\n", __FUNCTION__, err);
                return PTR_ERR(err);
        }
        /* Check if syscall itself was successful */
        if (IS_ERR(err = l4_get_retval())) {
                print_err("%s: SHMAT Error: %d.\n", __FUNCTION__, err);
                return PTR_ERR(err);
 
        }
        /* Obtain shm base. */
        return (void *)err;
}
 
int l4_shmdt(const void *shmaddr)
{
        int err;
 
        write_mr(L4SYS_ARG0, (unsigned long)shmaddr);
 
        /* Call pager with shmget() request. Check ipc error. */
        if ((err = l4_sendrecv(pagerid, pagerid, L4_IPC_TAG_SHMDT)) < 0) {
                print_err("%s: L4 IPC Error: %d.\n", __FUNCTION__, err);
                return -1;
        }
        /* Check if syscall itself was successful */
        if ((err = l4_get_retval()) < 0) {
                print_err("%s: SHMDT Error: %d.\n", __FUNCTION__, err);
                return -1;
        }
        return 0;
}
 
int shmget(key_t key, size_t size, int shmflg)
{
        int ret = l4_shmget(key, size, shmflg);
 
        /* If error, return positive error code */
        if (ret < 0) {
                errno = -ret;
                return -1;
        }
        /* else return value */
        return ret;
}
 
void *shmat(int shmid, const void *shmaddr, int shmflg)
{
        void *ret = l4_shmat(shmid, shmaddr, shmflg);
 
        /* If error, return positive error code */
        if (IS_ERR(ret)) {
                errno = -((int)ret);
                return PTR_ERR(-1);
        }
        /* else return value */
        return ret;
}
 
int shmdt(const void *shmaddr)
{
        int ret = l4_shmdt(shmaddr);
 
        /* If error, return positive error code */
        if (ret < 0) {
                errno = -ret;
                return -1;
        }
        /* else return value */
        return ret;
}
 

Line No.	Rev	Author	Line
1	2	drasko	`/*`
2			`* This is the glue logic between posix shared memory functions`
3			`* and their L4 implementation.`
4			`*`
5			`* Copyright (C) 2007, 2008 Bahadir Balban`
6			`*/`
7			`#include <errno.h>`
8			`#include <stdio.h>`
9			`#include <sys/shm.h>`
10			`#include <sys/types.h>`
11			`#include <l4lib/ipcdefs.h>`
12			`#include <l4/macros.h>`
13			`#include <libposix.h>`
14
15			`int l4_shmget(l4id_t key, int size, int shmflg)`
16			`{`
17			`int err;`
18
19			`write_mr(L4SYS_ARG0, key);`
20			`write_mr(L4SYS_ARG1, size);`
21			`write_mr(L4SYS_ARG2, shmflg);`
22
23			`/* Call pager with shmget() request. Check ipc error. */`
24			`if ((err = l4_sendrecv(pagerid, pagerid, L4_IPC_TAG_SHMGET)) < 0) {`
25			`print_err("%s: L4 IPC Error: %d.\n", __FUNCTION__, err);`
26			`return err;`
27			`}`
28			`/* Check if syscall itself was successful */`
29			`if (IS_ERR(err = l4_get_retval())) {`
30			`print_err("%s: SHMGET Error: %d.\n", __FUNCTION__, err);`
31			`return err;`
32			`}`
33
34			`/* Otherwise err has the positive id number */`
35			`return err;`
36			`}`
37
38			`void l4_shmat(l4id_t shmid, const void shmaddr, int shmflg)`
39			`{`
40			`int err;`
41
42			`write_mr(L4SYS_ARG0, shmid);`
43			`write_mr(L4SYS_ARG1, (unsigned long)shmaddr);`
44			`write_mr(L4SYS_ARG2, shmflg);`
45
46			`/* Call pager with shmget() request. Check ipc error. */`
47			`if ((err = l4_sendrecv(pagerid, pagerid, L4_IPC_TAG_SHMAT)) < 0) {`
48			`print_err("%s: L4 IPC Error: %d.\n", __FUNCTION__, err);`
49			`return PTR_ERR(err);`
50			`}`
51			`/* Check if syscall itself was successful */`
52			`if (IS_ERR(err = l4_get_retval())) {`
53			`print_err("%s: SHMAT Error: %d.\n", __FUNCTION__, err);`
54			`return PTR_ERR(err);`
55
56			`}`
57			`/* Obtain shm base. */`
58			`return (void *)err;`
59			`}`
60
61			`int l4_shmdt(const void *shmaddr)`
62			`{`
63			`int err;`
64
65			`write_mr(L4SYS_ARG0, (unsigned long)shmaddr);`
66
67			`/* Call pager with shmget() request. Check ipc error. */`
68			`if ((err = l4_sendrecv(pagerid, pagerid, L4_IPC_TAG_SHMDT)) < 0) {`
69			`print_err("%s: L4 IPC Error: %d.\n", __FUNCTION__, err);`
70			`return -1;`
71			`}`
72			`/* Check if syscall itself was successful */`
73			`if ((err = l4_get_retval()) < 0) {`
74			`print_err("%s: SHMDT Error: %d.\n", __FUNCTION__, err);`
75			`return -1;`
76			`}`
77			`return 0;`
78			`}`
79
80			`int shmget(key_t key, size_t size, int shmflg)`
81			`{`
82			`int ret = l4_shmget(key, size, shmflg);`
83
84			`/* If error, return positive error code */`
85			`if (ret < 0) {`
86			`errno = -ret;`
87			`return -1;`
88			`}`
89			`/* else return value */`
90			`return ret;`
91			`}`
92
93			`void shmat(int shmid, const void shmaddr, int shmflg)`
94			`{`
95			`void *ret = l4_shmat(shmid, shmaddr, shmflg);`
96
97			`/* If error, return positive error code */`
98			`if (IS_ERR(ret)) {`
99			`errno = -((int)ret);`
100			`return PTR_ERR(-1);`
101			`}`
102			`/* else return value */`
103			`return ret;`
104			`}`
105
106			`int shmdt(const void *shmaddr)`
107			`{`
108			`int ret = l4_shmdt(shmaddr);`
109
110			`/* If error, return positive error code */`
111			`if (ret < 0) {`
112			`errno = -ret;`
113			`return -1;`
114			`}`
115			`/* else return value */`
116			`return ret;`
117			`}`
118

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[/] [c0or1k/] [trunk/] [conts/] [posix/] [libposix/] [shm.c] - Blame information for rev 2