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Fix memory allocation on Windows.

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* Take the cache line roundings into account when allocating a hunk.
* Use size_t were apropriate.
* remove some unnecessary and likely broken calls.

Another case of: "How could this ever work"?
This commit is contained in:
Yamagi Burmeister 2018-10-25 18:42:01 +02:00
parent 60c12228c9
commit b9e5306c84
1 changed files with 8 additions and 11 deletions
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19
src/backends/windows/shared/hunk.c
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@ -30,17 +30,18 @@
byte *membase; byte *membase;
int hunkcount; int hunkcount;
int hunkmaxsize; size_t hunkmaxsize;
int cursize; size_t cursize;
void * void *
Hunk_Begin(int maxsize) Hunk_Begin(int maxsize)
{ {
/* reserve a huge chunk of memory, /* reserve a huge chunk of memory, but don't commit any yet */
but don't commit any yet */ /* plus 32 bytes for cacheline */
hunkmaxsize = maxsize + sizeof(size_t) + 32;
cursize = 0; cursize = 0;
hunkmaxsize = maxsize;
membase = VirtualAlloc(NULL, maxsize, MEM_RESERVE, PAGE_NOACCESS); membase = VirtualAlloc(NULL, hunkmaxsize, MEM_RESERVE, PAGE_NOACCESS);
if (!membase) if (!membase)
{ {
@ -63,10 +64,7 @@ Hunk_Alloc(int size)
if (!buf) if (!buf)
{ {
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, Sys_Error("VirtualAlloc commit failed.\n");
NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR)&buf, 0, NULL);
Sys_Error("VirtualAlloc commit failed.\n%s", buf);
} }
cursize += size; cursize += size;
@ -97,4 +95,3 @@ Hunk_Free(void *base)
hunkcount--; hunkcount--;
} }