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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkOnce.h"
#include "SkRunnable.h"
#include "SkTaskGroup.h"
#include "Test.h"
static void add_five(int* x) {
*x += 5;
}
SK_DECLARE_STATIC_ONCE(st_once);
DEF_TEST(SkOnce_Singlethreaded, r) {
int x = 0;
// No matter how many times we do this, x will be 5.
SkOnce(&st_once, add_five, &x);
SkOnce(&st_once, add_five, &x);
SkOnce(&st_once, add_five, &x);
SkOnce(&st_once, add_five, &x);
SkOnce(&st_once, add_five, &x);
REPORTER_ASSERT(r, 5 == x);
}
SK_DECLARE_STATIC_ONCE(mt_once);
DEF_TEST(SkOnce_Multithreaded, r) {
int x = 0;
// Run a bunch of tasks to be the first to add six to x.
SkTaskGroup().batch(1021, [&](int) {
void(*add_six)(int*) = [](int* p) { *p += 6; };
SkOnce(&mt_once, add_six, &x);
});
// Only one should have done the +=.
REPORTER_ASSERT(r, 6 == x);
}
static int gX = 0;
static void inc_gX() { gX++; }
SK_DECLARE_STATIC_ONCE(noarg_once);
DEF_TEST(SkOnce_NoArg, r) {
SkOnce(&noarg_once, inc_gX);
SkOnce(&noarg_once, inc_gX);
SkOnce(&noarg_once, inc_gX);
REPORTER_ASSERT(r, 1 == gX);
}
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