* lzms_range_encoder_raw. */
struct lzms_range_encoder_raw *rc;
- /* Bits recently encoded by this range encoder. This are used as in
+ /* Bits recently encoded by this range encoder. This is used as an
* index into @prob_entries. */
u32 state;
static void
lzms_init_rc_costs(void)
{
- static bool done = false;
- static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
-
- if (unlikely(!done)) {
- pthread_mutex_lock(&mutex);
- if (!done) {
- lzms_do_init_rc_costs();
- done = true;
- }
- pthread_mutex_unlock(&mutex);
- }
+ static pthread_once_t once = PTHREAD_ONCE_INIT;
+
+ pthread_once(&once, lzms_do_init_rc_costs);
}
/*
ctx->optimum_end_idx = 0;
longest_rep_len = ctx->params.min_match_length - 1;
- if (lz_bt_get_position(&ctx->mf) >= 1) {
+ if (lz_bt_get_position(&ctx->mf) >= LZMS_MAX_INIT_RECENT_OFFSET) {
u32 limit = min(ctx->params.max_match_length,
lz_bt_get_remaining_size(&ctx->mf));
for (int i = 0; i < LZMS_NUM_RECENT_OFFSETS; i++) {
return lzms_match_chooser_reverse_list(ctx, cur_pos);
longest_rep_len = ctx->params.min_match_length - 1;
- u32 limit = min(ctx->params.max_match_length,
- lz_bt_get_remaining_size(&ctx->mf));
- for (int i = 0; i < LZMS_NUM_RECENT_OFFSETS; i++) {
- u32 offset = ctx->optimum[cur_pos].state.lru.recent_offsets[i];
- const u8 *strptr = lz_bt_get_window_ptr(&ctx->mf);
- const u8 *matchptr = strptr - offset;
- u32 len = 0;
- while (len < limit && strptr[len] == matchptr[len])
- len++;
- if (len > longest_rep_len) {
- longest_rep_len = len;
- longest_rep_offset = offset;
+ if (lz_bt_get_position(&ctx->mf) >= LZMS_MAX_INIT_RECENT_OFFSET) {
+ u32 limit = min(ctx->params.max_match_length,
+ lz_bt_get_remaining_size(&ctx->mf));
+ for (int i = 0; i < LZMS_NUM_RECENT_OFFSETS; i++) {
+ u32 offset = ctx->optimum[cur_pos].state.lru.recent_offsets[i];
+ const u8 *strptr = lz_bt_get_window_ptr(&ctx->mf);
+ const u8 *matchptr = strptr - offset;
+ u32 len = 0;
+ while (len < limit && strptr[len] == matchptr[len])
+ len++;
+ if (len > longest_rep_len) {
+ longest_rep_len = len;
+ longest_rep_offset = offset;
+ }
}
}