mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-05 08:35:26 +00:00
138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
/*
|
|
MacOS.c
|
|
|
|
Some routines for the Macintosh OS port of the Hans-J. Boehm, Alan J. Demers
|
|
garbage collector.
|
|
|
|
<Revision History>
|
|
|
|
11/22/94 pcb StripAddress the temporary memory handle for 24-bit mode.
|
|
11/30/94 pcb Tracking all memory usage so we can deallocate it all at once.
|
|
02/10/96 pcb Added routine to perform a final collection when
|
|
unloading shared library.
|
|
|
|
by Patrick C. Beard.
|
|
*/
|
|
/* Boehm, February 15, 1996 2:55 pm PST */
|
|
|
|
#include <Resources.h>
|
|
#include <Memory.h>
|
|
#include <LowMem.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "gc.h"
|
|
#include "gc_priv.h"
|
|
|
|
// use 'CODE' resource 0 to get exact location of the beginning of global space.
|
|
|
|
typedef struct {
|
|
unsigned long aboveA5;
|
|
unsigned long belowA5;
|
|
unsigned long JTSize;
|
|
unsigned long JTOffset;
|
|
} *CodeZeroPtr, **CodeZeroHandle;
|
|
|
|
void* GC_MacGetDataStart()
|
|
{
|
|
CodeZeroHandle code0 = (CodeZeroHandle)GetResource('CODE', 0);
|
|
if (code0) {
|
|
long belowA5Size = (**code0).belowA5;
|
|
ReleaseResource((Handle)code0);
|
|
return (LMGetCurrentA5() - belowA5Size);
|
|
}
|
|
fprintf(stderr, "Couldn't load the jump table.");
|
|
exit(-1);
|
|
return 0;
|
|
}
|
|
|
|
/* track the use of temporary memory so it can be freed all at once. */
|
|
|
|
typedef struct TemporaryMemoryBlock TemporaryMemoryBlock, **TemporaryMemoryHandle;
|
|
|
|
struct TemporaryMemoryBlock {
|
|
TemporaryMemoryHandle nextBlock;
|
|
char data[];
|
|
};
|
|
|
|
static TemporaryMemoryHandle theTemporaryMemory = NULL;
|
|
static Boolean firstTime = true;
|
|
|
|
void GC_MacFreeTemporaryMemory(void);
|
|
|
|
Ptr GC_MacTemporaryNewPtr(size_t size, Boolean clearMemory)
|
|
{
|
|
static Boolean firstTime = true;
|
|
OSErr result;
|
|
TemporaryMemoryHandle tempMemBlock;
|
|
Ptr tempPtr = nil;
|
|
|
|
tempMemBlock = (TemporaryMemoryHandle)TempNewHandle(size + sizeof(TemporaryMemoryBlock), &result);
|
|
if (tempMemBlock && result == noErr) {
|
|
HLockHi((Handle)tempMemBlock);
|
|
tempPtr = (**tempMemBlock).data;
|
|
if (clearMemory) memset(tempPtr, 0, size);
|
|
tempPtr = StripAddress(tempPtr);
|
|
|
|
// keep track of the allocated blocks.
|
|
(**tempMemBlock).nextBlock = theTemporaryMemory;
|
|
theTemporaryMemory = tempMemBlock;
|
|
}
|
|
|
|
# if !defined(SHARED_LIBRARY_BUILD)
|
|
// install an exit routine to clean up the memory used at the end.
|
|
if (firstTime) {
|
|
atexit(&GC_MacFreeTemporaryMemory);
|
|
firstTime = false;
|
|
}
|
|
# endif
|
|
|
|
return tempPtr;
|
|
}
|
|
|
|
extern word GC_fo_entries;
|
|
|
|
static void perform_final_collection()
|
|
{
|
|
unsigned i;
|
|
word last_fo_entries = 0;
|
|
|
|
/* adjust the stack bottom, because CFM calls us from another stack
|
|
location. */
|
|
GC_stackbottom = (ptr_t)&i;
|
|
|
|
/* try to collect and finalize everything in sight */
|
|
for (i = 0; i < 2 || GC_fo_entries < last_fo_entries; i++) {
|
|
last_fo_entries = GC_fo_entries;
|
|
GC_gcollect();
|
|
}
|
|
}
|
|
|
|
|
|
void GC_MacFreeTemporaryMemory()
|
|
{
|
|
# if defined(SHARED_LIBRARY_BUILD)
|
|
/* if possible, collect all memory, and invoke all finalizers. */
|
|
perform_final_collection();
|
|
# endif
|
|
|
|
if (theTemporaryMemory != NULL) {
|
|
long totalMemoryUsed = 0;
|
|
TemporaryMemoryHandle tempMemBlock = theTemporaryMemory;
|
|
while (tempMemBlock != NULL) {
|
|
TemporaryMemoryHandle nextBlock = (**tempMemBlock).nextBlock;
|
|
totalMemoryUsed += GetHandleSize((Handle)tempMemBlock);
|
|
DisposeHandle((Handle)tempMemBlock);
|
|
tempMemBlock = nextBlock;
|
|
}
|
|
theTemporaryMemory = NULL;
|
|
|
|
# if !defined(SILENT) && !defined(SHARED_LIBRARY_BUILD)
|
|
fprintf(stdout, "[total memory used: %ld bytes.]\n",
|
|
totalMemoryUsed);
|
|
fprintf(stdout, "[total collections: %ld.]\n", GC_gc_no);
|
|
# endif
|
|
}
|
|
}
|