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!37 修复SYSV shm有关函数 

Merge pull request !37 from laokz/shm
This commit is contained in:
openharmony_ci 2020-12-03 14:28:18 +08:00 committed by Gitee
parent 8271a069f2 bd9b180b27
commit 9bc3a1cf3f
1 changed files with 17 additions and 11 deletions
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28
kernel/base/vm/shm.c
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@ -337,10 +337,14 @@ VOID OsShmRegionFree(LosVmSpace *space, LosVmMapRegion *region)
return;
}
LOS_ArchMmuUnmap(&space->archMmu, region->range.base, region->range.size >> PAGE_SHIFT);
ShmPagesRefDec(seg);
seg->ds.shm_nattch--;
if (seg->ds.shm_nattch <= 0) {
if (seg->ds.shm_nattch <= 0 && (seg->status & SHM_SEG_REMOVE)) {
ShmFreeSeg(seg);
} else {
seg->ds.shm_dtime = time(NULL);
seg->ds.shm_lpid = LOS_GetCurrProcessID();/* may not be the space's PID. */
}
SYSV_SHM_UNLOCK();
}
@ -411,7 +415,7 @@ INT32 ShmGet(key_t key, size_t size, INT32 shmflg)
SYSV_SHM_LOCK();
if ((((UINT32)shmflg & IPC_CREAT) == 0) &&
(((UINT32)shmflg & IPC_EXCL) == 0)) {
(((UINT32)shmflg & IPC_EXCL) == 1)) {
ret = -EINVAL;
goto ERROR;
}
@ -487,13 +491,15 @@ LosVmMapRegion *ShmatVmmAlloc(struct shmIDSource *seg, const VOID *shmaddr,
} else {
vaddr = (VADDR_T)(UINTPTR)shmaddr;
}
if ((shmflg & SHM_REMAP)) {
vaddr = (VADDR_T)LOS_MMap(vaddr, seg->ds.shm_segsz, prot,
MAP_ANONYMOUS | MAP_SHARED, -1, 0);
region = LOS_RegionFind(space, vaddr);
} else {
region = LOS_RegionAlloc(space, vaddr, seg->ds.shm_segsz, regionFlags, 0);
if (!(shmflg & SHM_REMAP) && (LOS_RegionFind(space, vaddr) ||
LOS_RegionFind(space, vaddr + seg->ds.shm_segsz - 1) ||
LOS_RegionRangeFind(space, vaddr, seg->ds.shm_segsz - 1))) {
ret = EINVAL;
goto ERROR;
}
vaddr = (VADDR_T)LOS_MMap(vaddr, seg->ds.shm_segsz, prot,
MAP_ANONYMOUS | MAP_SHARED, -1, 0);
region = LOS_RegionFind(space, vaddr);
}
if (region == NULL) {
@ -718,10 +724,10 @@ INT32 ShmDt(const VOID *shmaddr)
if ((seg->ds.shm_nattch <= 0) &&
(seg->status & SHM_SEG_REMOVE)) {
ShmFreeSeg(seg);
} else {
seg->ds.shm_dtime = time(NULL);
seg->ds.shm_lpid = LOS_GetCurrProcessID();
}
seg->ds.shm_dtime = time(NULL);
seg->ds.shm_lpid = LOS_GetCurrProcessID();
SYSV_SHM_UNLOCK();
(VOID)LOS_MuxRelease(&space->regionMux);
return 0;