void *
get_chunk()
{
int i;
ChunkArenaPtr arena = NULL;
if(currentArena && currentArena->bitmap != 0) {
arena = currentArena;
} else {
if(used_chunks >= CHUNKS(chunkHighMark))
maybe_free_chunks(0, 0);
if(used_chunks >= CHUNKS(chunkHighMark))
return NULL;
arena = findArena();
if(!arena)
return NULL;
currentArena = arena;
}
i = BITMAP_FFS(arena->bitmap) - 1;
arena->bitmap &= ~BITMAP_BIT(i);
used_chunks++;
return arena->chunks + CHUNK_SIZE * i;
}
void
initChunks(void)
{
int i;
used_chunks = 0;
initChunksCommon();
pagesize = getpagesize();
if((CHUNK_SIZE * ARENA_CHUNKS) % pagesize != 0) {
do_log(L_ERROR,
"The arena size %d (%d x %d) "
"is not a multiple of the page size %d.\n",
ARENA_CHUNKS * CHUNK_SIZE, ARENA_CHUNKS, CHUNK_SIZE, pagesize);
abort();
}
numArenas =
(CHUNKS(chunkHighMark) + (ARENA_CHUNKS - 1)) / ARENA_CHUNKS;
chunkArenas = malloc(numArenas * sizeof(ChunkArenaRec));
if(chunkArenas == NULL) {
do_log(L_ERROR, "Couldn't allocate chunk arenas.\n");
polipoExit();
}
for(i = 0; i < numArenas; i++) {
chunkArenas[i].bitmap = EMPTY_BITMAP;
chunkArenas[i].chunks = NULL;
}
currentArena = NULL;
}
static void maybe_free_chunks(int arenas, int force)
{
if (force || used_chunks >= CHUNKS(chunkHighMark)) {
discardObjects(force, force);
}
if (arenas)
free_chunk_arenas();
if (used_chunks >= CHUNKS(chunkLowMark) && !objectExpiryScheduled) {
TimeEventHandlerPtr event;
event = scheduleTimeEvent(1, discardObjectsHandler, 0, NULL);
if (event)
objectExpiryScheduled = 1;
}
}
void *get_chunk()
{
void *chunk;
if (used_chunks > CHUNKS(chunkHighMark))
maybe_free_chunks(0, 0);
if (used_chunks > CHUNKS(chunkHighMark))
return NULL;
chunk = malloc(CHUNK_SIZE);
if (!chunk) {
maybe_free_chunks(1, 1);
chunk = malloc(CHUNK_SIZE);
if (!chunk)
return NULL;
}
used_chunks++;
return chunk;
}
void *maybe_get_chunk()
{
void *chunk;
if (used_chunks > CHUNKS(chunkHighMark))
return NULL;
chunk = malloc(CHUNK_SIZE);
if (chunk)
used_chunks++;
return chunk;
}
