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Move atomic statscounter next to the non-atomic definition

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(cherry picked from commit 9c4dd863a6)
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Aydın Mercan 2023-12-11 17:26:04 +03:00
parent 9601763943
commit 6c0ae4ef6e
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2 changed files with 16 additions and 15 deletions
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10
lib/isc/include/isc/types.h
View file

@ -20,6 +20,7 @@
* OS-specific types, from the OS-specific include directories.
*/
#include <inttypes.h>
#include <stdatomic.h>
#include <stdbool.h>
#include <isc/offset.h>
@ -74,10 +75,11 @@ typedef struct isc_rwlock isc_rwlock_t; /*%< Read Write Lock */
typedef struct isc_sockaddr isc_sockaddr_t; /*%< Socket Address */
typedef ISC_LIST(isc_sockaddr_t) isc_sockaddrlist_t; /*%< Socket Address List
* */
typedef struct isc_stats isc_stats_t; /*%< Statistics */
typedef int_fast64_t isc_statscounter_t;
typedef struct isc_symtab isc_symtab_t; /*%< Symbol Table */
typedef struct isc_task isc_task_t; /*%< Task */
typedef struct isc_stats isc_stats_t; /*%< Statistics */
typedef int_fast64_t isc_statscounter_t;
typedef atomic_int_fast64_t isc_atomic_statscounter_t;
typedef struct isc_symtab isc_symtab_t; /*%< Symbol Table */
typedef struct isc_task isc_task_t; /*%< Task */
typedef ISC_LIST(isc_task_t) isc_tasklist_t; /*%< Task List */
typedef struct isc_taskmgr isc_taskmgr_t; /*%< Task Manager */
typedef struct isc_textregion isc_textregion_t; /*%< Text Region */

21
lib/isc/stats.c
View file

@ -28,16 +28,14 @@
#define ISC_STATS_MAGIC ISC_MAGIC('S', 't', 'a', 't')
#define ISC_STATS_VALID(x) ISC_MAGIC_VALID(x, ISC_STATS_MAGIC)
typedef atomic_int_fast64_t isc__atomic_statcounter_t;
/*
* Statistics are counted with an atomic int_fast64_t but exported to functions
* taking int64_t (isc_stats_dumper_t). A 128-bit native and fast architecture
* taking uint64_t (isc_stats_dumper_t). A 128-bit native and fast architecture
* doesn't exist in reality so these two are the same thing in practise.
* However, a silent truncation happening silently in the future is still not
* acceptable.
*/
STATIC_ASSERT(sizeof(isc__atomic_statcounter_t) <= sizeof(int64_t),
STATIC_ASSERT(sizeof(isc_statscounter_t) <= sizeof(uint64_t),
"Exported statistics must fit into the statistic counter size");
struct isc_stats {
@ -45,7 +43,7 @@ struct isc_stats {
isc_mem_t *mctx;
isc_refcount_t references;
int ncounters;
isc__atomic_statcounter_t *counters;
isc_atomic_statscounter_t *counters;
};
static isc_result_t
@ -56,7 +54,7 @@ create_stats(isc_mem_t *mctx, int ncounters, isc_stats_t **statsp) {
REQUIRE(statsp != NULL && *statsp == NULL);
stats = isc_mem_get(mctx, sizeof(*stats));
counters_alloc_size = sizeof(isc__atomic_statcounter_t) * ncounters;
counters_alloc_size = sizeof(isc_atomic_statscounter_t) * ncounters;
stats->counters = isc_mem_get(mctx, counters_alloc_size);
isc_refcount_init(&stats->references, 1);
for (int i = 0; i < ncounters; i++) {
@ -92,7 +90,7 @@ isc_stats_detach(isc_stats_t **statsp) {
if (isc_refcount_decrement(&stats->references) == 1) {
isc_refcount_destroy(&stats->references);
isc_mem_put(stats->mctx, stats->counters,
sizeof(isc__atomic_statcounter_t) *
sizeof(isc_atomic_statscounter_t) *
stats->ncounters);
isc_mem_putanddetach(&stats->mctx, stats, sizeof(*stats));
}
@ -135,7 +133,8 @@ isc_stats_dump(isc_stats_t *stats, isc_stats_dumper_t dump_fn, void *arg,
REQUIRE(ISC_STATS_VALID(stats));
for (i = 0; i < stats->ncounters; i++) {
int_fast64_t counter = atomic_load_acquire(&stats->counters[i]);
isc_statscounter_t counter =
atomic_load_acquire(&stats->counters[i]);
if ((options & ISC_STATSDUMP_VERBOSE) == 0 && counter == 0) {
continue;
}
@ -179,7 +178,7 @@ void
isc_stats_resize(isc_stats_t **statsp, int ncounters) {
isc_stats_t *stats;
size_t counters_alloc_size;
isc__atomic_statcounter_t *newcounters;
isc_atomic_statscounter_t *newcounters;
REQUIRE(statsp != NULL && *statsp != NULL);
REQUIRE(ISC_STATS_VALID(*statsp));
@ -192,7 +191,7 @@ isc_stats_resize(isc_stats_t **statsp, int ncounters) {
}
/* Grow number of counters. */
counters_alloc_size = sizeof(isc__atomic_statcounter_t) * ncounters;
counters_alloc_size = sizeof(isc_atomic_statscounter_t) * ncounters;
newcounters = isc_mem_get(stats->mctx, counters_alloc_size);
for (int i = 0; i < ncounters; i++) {
atomic_init(&newcounters[i], 0);
@ -202,7 +201,7 @@ isc_stats_resize(isc_stats_t **statsp, int ncounters) {
atomic_store_release(&newcounters[i], counter);
}
isc_mem_put(stats->mctx, stats->counters,
sizeof(isc__atomic_statcounter_t) * stats->ncounters);
sizeof(isc_atomic_statscounter_t) * stats->ncounters);
stats->counters = newcounters;
stats->ncounters = ncounters;
}