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Add munmap and mremap to the set of os interfaces that can be overloaded

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in os_unix.c.

FossilOrigin-Name: 8776047bd776bbf266eb9c3b56683badb84ae73e
This commit is contained in:
drh
2013-03-25 20:50:25 +00:00
parent b7e3a326fe
commit d1ab8065c1
4 changed files with 25 additions and 15 deletions
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20
src/os_unix.c
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@@ -447,6 +447,16 @@ static struct unix_syscall {
{ "mmap", (sqlite3_syscall_ptr)mmap, 0 },
#define osMmap ((void*(*)(void*,size_t,int,int,int,off_t))aSyscall[21].pCurrent)
{ "munmap", (sqlite3_syscall_ptr)munmap, 0 },
#define osMunmap ((void*(*)(void*,size_t))aSyscall[22].pCurrent)
#if defined(__linux__) && defined(_GNU_SOURCE)
{ "mremap", (sqlite3_syscall_ptr)mremap, 0 },
#else
{ "mremap", (sqlite3_syscall_ptr)0, 0 },
#endif
#define osMremap ((void*(*)(void*,size_t,size_t,int,...))aSyscall[23].pCurrent)
}; /* End of the overrideable system calls */
/*
@@ -4005,7 +4015,7 @@ static void unixShmPurge(unixFile *pFd){
sqlite3_mutex_free(p->mutex);
for(i=0; i<p->nRegion; i++){
if( p->h>=0 ){
munmap(p->apRegion[i], p->szRegion);
osMunmap(p->apRegion[i], p->szRegion);
}else{
sqlite3_free(p->apRegion[i]);
}
@@ -4278,7 +4288,7 @@ static int unixShmMap(
while(pShmNode->nRegion<=iRegion){
void *pMem;
if( pShmNode->h>=0 ){
pMem = mmap(0, szRegion,
pMem = osMmap(0, szRegion,
pShmNode->isReadonly ? PROT_READ : PROT_READ|PROT_WRITE,
MAP_SHARED, pShmNode->h, szRegion*(i64)pShmNode->nRegion
);
@@ -4501,7 +4511,7 @@ static int unixShmUnmap(
static void unixUnmapfile(unixFile *pFd){
assert( pFd->nFetchOut==0 );
if( pFd->pMapRegion ){
munmap(pFd->pMapRegion, pFd->mmapOrigsize);
osMunmap(pFd->pMapRegion, pFd->mmapOrigsize);
pFd->pMapRegion = 0;
pFd->mmapSize = 0;
pFd->mmapOrigsize = 0;
@@ -4548,7 +4558,7 @@ static int unixMapfile(unixFile *pFd, i64 nByte){
#if defined(__linux__) && defined(_GNU_SOURCE)
if( pFd->pMapRegion && nMap>0 ){
pNew = mremap(pFd->pMapRegion, pFd->mmapOrigsize, nMap, MREMAP_MAYMOVE);
pNew = osMremap(pFd->pMapRegion, pFd->mmapOrigsize, nMap, MREMAP_MAYMOVE);
}else
#endif
{
@@ -7196,7 +7206,7 @@ int sqlite3_os_init(void){
/* Double-check that the aSyscall[] array has been constructed
** correctly. See ticket [bb3a86e890c8e96ab] */
assert( ArraySize(aSyscall)==22 );
assert( ArraySize(aSyscall)==24 );
/* Register all VFSes defined in the aVfs[] array */
for(i=0; i<(sizeof(aVfs)/sizeof(sqlite3_vfs)); i++){