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custom message for SHMGET

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Ben Gras 2014-07-26 13:53:51 +02:00 committed by Lionel Sambuc
parent 0881781e60
commit 8627d33a42
4 changed files with 19 additions and 12 deletions
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4
include/minix/com.h
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@ -827,10 +827,6 @@
/* Shared Memory */
#define IPC_SHMGET (IPC_BASE+1)
# define SHMGET_KEY m2_l1
# define SHMGET_SIZE m2_l2
# define SHMGET_FLAG m2_i1
# define SHMGET_RETID m2_i2
#define IPC_SHMAT (IPC_BASE+2)
# define SHMAT_ID m2_i1
# define SHMAT_ADDR m2_l1

11
include/minix/ipc.h
View file

@ -5,6 +5,7 @@
#include <minix/type.h>
#include <minix/const.h>
#include <sys/signal.h>
#include <sys/types.h>
/*==========================================================================*
* Types relating to messages. *
@ -1764,6 +1765,15 @@ typedef struct {
} mess_lsys_vm_watch_exit;
_ASSERT_MSG_SIZE(mess_lsys_vm_watch_exit);
typedef struct {
key_t key;
size_t size;
int flag;
int retid;
uint8_t padding[40];
} mess_lc_ipc_shmget;
_ASSERT_MSG_SIZE(mess_lc_ipc_shmget);
typedef struct {
endpoint_t m_source; /* who sent the message */
int m_type; /* what kind of message is it */
@ -1990,6 +2000,7 @@ typedef struct {
mess_lsys_vm_info m_lsys_vm_info;
mess_lsys_vm_update m_lsys_vm_update;
mess_lsys_vm_watch_exit m_lsys_vm_watch_exit;
mess_lc_ipc_shmget m_lc_ipc_shmget;
mess_vfs_lchardriver_cancel m_vfs_lchardriver_cancel;
mess_vfs_lchardriver_openclose m_vfs_lchardriver_openclose;

8
lib/libc/sys-minix/shmget.c
View file

@ -30,12 +30,12 @@ int shmget(key_t key, size_t size, int shmflg)
}
memset(&m, 0, sizeof(m));
m.SHMGET_KEY = key;
m.SHMGET_SIZE = size;
m.SHMGET_FLAG = shmflg;
m.m_lc_ipc_shmget.key = key;
m.m_lc_ipc_shmget.size = size;
m.m_lc_ipc_shmget.flag = shmflg;
r = _syscall(ipc_pt, IPC_SHMGET, &m);
if (r != OK)
return r;
return m.SHMGET_RETID;
return m.m_lc_ipc_shmget.retid;
}

8
servers/ipc/shm.c
View file

@ -42,9 +42,9 @@ int do_shmget(message *m)
int flag;
int id;
key = m->SHMGET_KEY;
old_size = size = m->SHMGET_SIZE;
flag = m->SHMGET_FLAG;
key = m->m_lc_ipc_shmget.key;
old_size = size = m->m_lc_ipc_shmget.size;
flag = m->m_lc_ipc_shmget.flag;
if ((shm = shm_find_key(key))) {
if (!check_perm(&shm->shmid_ds.shm_perm, who_e, flag))
@ -97,7 +97,7 @@ int do_shmget(message *m)
shm_list_nr++;
}
m->SHMGET_RETID = id;
m->m_lc_ipc_shmget.retid = id;
return OK;
}