void vmem_unmapfile()
{
dbg_printf("vmem_unmapfile()\n");
vmem_decommit(preserve,preserve_size);
vmem_release(preserve,preserve_size);
preserve = NULL;
preserve_size = 0;
#if 0
if (pview)
{ int i;
i = UnmapViewOfFile(pview);
dbg_printf("i = x%x\n",i);
if (i == FALSE)
os_error();
}
#else
// Note that under Windows 95, UnmapViewOfFile() seems to return random
// values, not TRUE or FALSE.
if (pview && UnmapViewOfFile(pview) == FALSE)
os_error();
#endif
pview = NULL;
if (hFileMap != NULL && CloseHandle(hFileMap) != TRUE)
os_error();
hFileMap = NULL;
if (hFile != INVALID_HANDLE_VALUE && CloseHandle(hFile) != TRUE)
os_error();
hFile = INVALID_HANDLE_VALUE;
}
static void
umem_release(void)
{
#ifdef ZVM_ENABLE
umem_cache_t *cp;
vmem_release();
vmem_sbrk_release();
umem_release_log_header(umem_slab_log);
umem_release_log_header(umem_failure_log);
umem_release_log_header(umem_content_log);
umem_release_log_header(umem_transaction_log);
for (cp = umem_null_cache.cache_next; cp != &umem_null_cache;
cp = cp->cache_next)
umem_release_cache(cp);
umem_release_cache(&umem_null_cache);
(void) mutex_unlock(&umem_flags_lock);
(void) mutex_unlock(&umem_update_lock);
(void) mutex_unlock(&umem_cache_lock);
(void) mutex_unlock(&umem_init_lock);
#endif //ZVM_ENABLE
}
void *vmem_mapfile(const char *filename,void *ptr,unsigned long size,int flag)
{
OSVERSIONINFO OsVerInfo;
OsVerInfo.dwOSVersionInfoSize = sizeof(OsVerInfo);
GetVersionEx(&OsVerInfo);
dbg_printf("vmem_mapfile(filename = '%s', ptr = %p, size = x%lx, flag = %d)\n",filename,ptr,size,flag);
hFile = CreateFile(filename, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE)
goto L1; // failure
dbg_printf(" file created\n");
// Windows 95 does not implement PAGE_WRITECOPY (unfortunately treating
// it just like PAGE_READWRITE).
if (flag == 1 && OsVerInfo.dwPlatformId == 1) // Windows 95, 98, ME
hFileMap = NULL;
else
hFileMap = CreateFileMapping(hFile,NULL,
(flag == 1) ? PAGE_WRITECOPY : PAGE_READWRITE,0,size,NULL);
if (hFileMap == NULL) // mapping failed
{
#if 1
// Win32s seems to always fail here.
DWORD nbytes;
dbg_printf(" mapping failed\n");
// If it was NT failing, assert.
assert(OsVerInfo.dwPlatformId != VER_PLATFORM_WIN32_NT);
// To work around, just read the file into memory.
assert(flag == 1);
preserve = vmem_reserve(ptr,size);
if (!preserve)
goto L2;
if (!vmem_commit(preserve,size))
{
vmem_release(preserve,size);
preserve = NULL;
goto L2;
}
preserve_size = size;
if (!ReadFile(hFile,preserve,size,&nbytes,NULL))
os_error();
assert(nbytes == size);
if (CloseHandle(hFile) != TRUE)
os_error();
hFile = INVALID_HANDLE_VALUE;
return preserve;
#else
// Instead of working around, we should find out why it failed.
os_error();
#endif
}
else
{
dbg_printf(" mapping created\n");
pview = MapViewOfFileEx(hFileMap,flag ? FILE_MAP_COPY : FILE_MAP_WRITE,
0,0,size,ptr);
if (pview == NULL) // mapping view failed
{ //os_error();
goto L3;
}
}
dbg_printf(" pview = %p\n",pview);
return pview;
Terminate:
if (UnmapViewOfFile(pview) == FALSE)
os_error();
pview = NULL;
L3:
if (CloseHandle(hFileMap) != TRUE)
os_error();
hFileMap = NULL;
L2:
if (CloseHandle(hFile) != TRUE)
os_error();
hFile = INVALID_HANDLE_VALUE;
L1:
return NULL; // failure
}
static void
umem_do_release(int as_child)
{
umem_cache_t *cp;
int cleanup_update = 0;
/*
* Clean up the update state if we are the child process and
* another thread was processing updates.
*/
if (as_child) {
if (umem_update_thr != thr_self()) {
umem_update_thr = 0;
cleanup_update = 1;
}
if (umem_st_update_thr != thr_self()) {
umem_st_update_thr = 0;
cleanup_update = 1;
}
}
if (cleanup_update) {
umem_reaping = UMEM_REAP_DONE;
for (cp = umem_null_cache.cache_next; cp != &umem_null_cache;
cp = cp->cache_next) {
if (cp->cache_uflags & UMU_NOTIFY)
cp->cache_uflags &= ~UMU_NOTIFY;
/*
* If the cache is active, we just re-add it to
* the update list. This will re-do any active
* updates on the cache, but that won't break
* anything.
*
* The worst that can happen is a cache has
* its magazines rescaled twice, instead of once.
*/
if (cp->cache_uflags & UMU_ACTIVE) {
umem_cache_t *cnext, *cprev;
ASSERT(cp->cache_unext == NULL &&
cp->cache_uprev == NULL);
cp->cache_uflags &= ~UMU_ACTIVE;
cp->cache_unext = cnext = &umem_null_cache;
cp->cache_uprev = cprev =
umem_null_cache.cache_uprev;
cnext->cache_uprev = cp;
cprev->cache_unext = cp;
}
}
}
umem_release_log_header(umem_slab_log);
umem_release_log_header(umem_failure_log);
umem_release_log_header(umem_content_log);
umem_release_log_header(umem_transaction_log);
for (cp = umem_null_cache.cache_next; cp != &umem_null_cache;
cp = cp->cache_next)
umem_release_cache(cp);
umem_release_cache(&umem_null_cache);
(void) mutex_unlock(&umem_flags_lock);
(void) mutex_unlock(&umem_update_lock);
(void) mutex_unlock(&umem_cache_lock);
vmem_sbrk_release();
vmem_release();
(void) mutex_unlock(&umem_init_lock);
}
