1 /* 2 * Copyright 2013 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "SkOnce.h" 9 #include "SkTaskGroup.h" 10 #include "Test.h" 11 12 static void add_five(int* x) { 13 *x += 5; 14 } 15 16 DEF_TEST(SkOnce_Singlethreaded, r) { 17 int x = 0; 18 19 // No matter how many times we do this, x will be 5. 20 SkOnce once; 21 once(add_five, &x); 22 once(add_five, &x); 23 once(add_five, &x); 24 once(add_five, &x); 25 once(add_five, &x); 26 27 REPORTER_ASSERT(r, 5 == x); 28 } 29 30 DEF_TEST(SkOnce_Multithreaded, r) { 31 int x = 0; 32 33 // Run a bunch of tasks to be the first to add six to x. 34 SkOnce once; 35 SkTaskGroup().batch(1021, [&](int) { 36 once([&] { x += 6; }); 37 }); 38 39 // Only one should have done the +=. 40 REPORTER_ASSERT(r, 6 == x); 41 } 42 43 static int gX = 0; 44 static void inc_gX() { gX++; } 45 46 DEF_TEST(SkOnce_NoArg, r) { 47 SkOnce once; 48 once(inc_gX); 49 once(inc_gX); 50 once(inc_gX); 51 REPORTER_ASSERT(r, 1 == gX); 52 } 53
