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This commit is contained in:
Evan Hunt
2020-02-13 14:44:37 -08:00
parent 0255a97473
commit e851ed0bb5
669 changed files with 35995 additions and 42219 deletions
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29
lib/isc/counter.c
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@@ -21,20 +21,19 @@
#include <isc/refcount.h>
#include <isc/util.h>
#define COUNTER_MAGIC ISC_MAGIC('C', 'n', 't', 'r')
#define COUNTER_MAGIC ISC_MAGIC('C', 'n', 't', 'r')
#define VALID_COUNTER(r) ISC_MAGIC_VALID(r, COUNTER_MAGIC)
struct isc_counter {
unsigned int magic;
isc_mem_t * mctx;
isc_refcount_t references;
unsigned int magic;
isc_mem_t *mctx;
isc_refcount_t references;
atomic_uint_fast32_t limit;
atomic_uint_fast32_t used;
};
isc_result_t
isc_counter_create(isc_mem_t *mctx, int limit, isc_counter_t **counterp)
{
isc_counter_create(isc_mem_t *mctx, int limit, isc_counter_t **counterp) {
isc_counter_t *counter;
REQUIRE(counterp != NULL && *counterp == NULL);
@@ -54,8 +53,7 @@ isc_counter_create(isc_mem_t *mctx, int limit, isc_counter_t **counterp)
}
isc_result_t
isc_counter_increment(isc_counter_t *counter)
{
isc_counter_increment(isc_counter_t *counter) {
uint32_t used = atomic_fetch_add_relaxed(&counter->used, 1) + 1;
uint32_t limit = atomic_load_acquire(&counter->limit);
@@ -67,24 +65,21 @@ isc_counter_increment(isc_counter_t *counter)
}
unsigned int
isc_counter_used(isc_counter_t *counter)
{
isc_counter_used(isc_counter_t *counter) {
REQUIRE(VALID_COUNTER(counter));
return (atomic_load_acquire(&counter->used));
}
void
isc_counter_setlimit(isc_counter_t *counter, int limit)
{
isc_counter_setlimit(isc_counter_t *counter, int limit) {
REQUIRE(VALID_COUNTER(counter));
atomic_store(&counter->limit, limit);
}
void
isc_counter_attach(isc_counter_t *source, isc_counter_t **targetp)
{
isc_counter_attach(isc_counter_t *source, isc_counter_t **targetp) {
REQUIRE(VALID_COUNTER(source));
REQUIRE(targetp != NULL && *targetp == NULL);
@@ -94,16 +89,14 @@ isc_counter_attach(isc_counter_t *source, isc_counter_t **targetp)
}
static void
destroy(isc_counter_t *counter)
{
destroy(isc_counter_t *counter) {
isc_refcount_destroy(&counter->references);
counter->magic = 0;
isc_mem_putanddetach(&counter->mctx, counter, sizeof(*counter));
}
void
isc_counter_detach(isc_counter_t **counterp)
{
isc_counter_detach(isc_counter_t **counterp) {
isc_counter_t *counter;
REQUIRE(counterp != NULL && *counterp != NULL);