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7dfd54cf4a
For hot path, there is only need to a load instruction to load if initialized are true now, So the extra cost is minimal. Signed-off-by: Yonggang Luo <luoyonggang@gmail.com> Acked-by: Marek Olšák <marek.olsak@amd.com> Reviewed-by: Chia-I Wu <olvaffe@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18323>
67 lines
1.4 KiB
C++
67 lines
1.4 KiB
C++
/*
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* Copyright 2022 Yonggang Luo
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* SPDX-License-Identifier: MIT
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*
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* Testing u_call_once.h
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <gtest/gtest.h>
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#include "c11/threads.h"
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#include "util/u_atomic.h"
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#include "util/u_call_once.h"
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#define NUM_DEBUG_TEST_THREAD 8
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static void update_x(int *x) {
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p_atomic_inc(x);
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}
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static int xC;
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static void update_x_global(void)
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{
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update_x(&xC);
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}
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static int test_call_once(void *_state)
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{
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static int xA = 0;
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{
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static once_flag once = ONCE_FLAG_INIT;
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for (int i = 0; i < 100; i += 1) {
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util_call_once_data_slow(&once, (util_call_once_data_func)update_x, &xA);
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}
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}
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static int xB = 0;
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{
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static util_once_flag once = UTIL_ONCE_FLAG_INIT;
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for (int i = 0; i < 100; i += 1) {
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util_call_once_data(&once, (util_call_once_data_func)update_x, &xB);
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}
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}
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{
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static util_once_flag once = UTIL_ONCE_FLAG_INIT;
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for (int i = 0; i < 100; i += 1) {
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util_call_once(&once, update_x_global);
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}
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}
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EXPECT_EQ(xA, 1);
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EXPECT_EQ(xB, 1);
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EXPECT_EQ(xC, 1);
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return 0;
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}
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TEST(UtilCallOnce, Multithread)
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{
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thrd_t threads[NUM_DEBUG_TEST_THREAD];
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for (unsigned i = 0; i < NUM_DEBUG_TEST_THREAD; i++) {
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thrd_create(&threads[i], test_call_once, NULL);
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}
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for (unsigned i = 0; i < NUM_DEBUG_TEST_THREAD; i++) {
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int ret;
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thrd_join(threads[i], &ret);
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}
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}
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