NS_COM_GLUE nsresult
nsMemory::HeapMinimize(bool aImmediate)
{
nsCOMPtr<nsIMemory> mem;
nsresult rv = NS_GetMemoryManager(getter_AddRefs(mem));
NS_ENSURE_SUCCESS(rv, rv);
return mem->HeapMinimize(aImmediate);
}
NS_COM_GLUE nsIMemory*
nsMemory::GetGlobalMemoryService()
{
nsIMemory* mem;
nsresult rv = NS_GetMemoryManager(&mem);
if (NS_FAILED(rv)) return nsnull;
return mem;
}
NS_COM_GLUE nsresult
nsMemory::HeapMinimize(bool aImmediate)
{
nsCOMPtr<nsIMemory> mem;
nsresult rv = NS_GetMemoryManager(getter_AddRefs(mem));
if (NS_WARN_IF(NS_FAILED(rv)))
return rv;
return mem->HeapMinimize(aImmediate);
}
nsIMemory*
nsMemory::GetGlobalMemoryService()
{
nsIMemory* mem;
nsresult rv = NS_GetMemoryManager(&mem);
if (NS_FAILED(rv)) {
return nullptr;
}
return mem;
}
nsresult GlueStartupMemory()
{
NS_ASSERTION(!gMemory, "must be called once");
if (!gMemory)
{
NS_GetMemoryManager(&gMemory);
NS_ASSERTION(gMemory, "can't get memory manager!");
if (!gMemory)
return NS_ERROR_FAILURE;
}
return NS_OK;
}
static nsIMemory*
SetupGlobalMemory()
{
NS_ASSERTION(!gMemory, "must be called once");
if (!gMemory)
{
NS_GetMemoryManager(&gMemory);
NS_ASSERTION(gMemory, "can't get memory manager!");
if (gMemory)
NS_RegisterXPCOMExitRoutine(FreeGlobalMemory, 0);
}
return gMemory;
}
int main(int argc, char **argv)
{
nsCOMPtr<nsIMemory> mem;
nsresult rv = NS_GetMemoryManager(getter_AddRefs(mem));
if (!mem || NS_FAILED(rv))
{
printf("Could not get the memory manager\n");
return -1;
}
// allocation note. don't use nsIMemory to allocate,
// because we want to test the isLowMemory predicate
// without regard for the nsIMemory impelmentation (the
// implementation might count bytes handed out. however,
// the predicate should work with out having to rely on
// that.
void *big_alloc = malloc(1024 * 1024 * 16);
const int highpower = 500000;
char* buffers[highpower];
for (int i=0; i<highpower; i++)
buffers[i] = nsnull;
for (int i=0; i<highpower; i++)
{
PRBool lowMem = PR_FALSE;
size_t s = 4096; //pow(2,i);
buffers[i] = (char*) malloc(s);
// You have to touch the buffer
if (!buffers[i])
printf("Could not allocate a buffer of size %ld\n", s);
else
{
for (int j=0; j<s; j++)
buffers[i][j] = 'a';
}
PRIntervalTime start = PR_IntervalNow();
mem->IsLowMemory(&lowMem);
PRIntervalTime cost = PR_IntervalNow() - start;
printf("Total Allocated: %ld. \tLow Memory now? %s\t Took (%d)\n",
s*i,
lowMem ? "Yes" : "No",
PR_IntervalToMilliseconds(cost));
if (lowMem)
break;
}
for(int i=0; i<highpower; i++)
{
if (buffers[i])
free(buffers[i]);
}
return 0;
}
