1 /* 2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 #include "precompiled.hpp" 25 #include "runtime/semaphore.hpp" 26 #include "unittest.hpp" 27 28 static void test_semaphore_single_separate(uint count) { 29 Semaphore sem(0); 30 31 for (uint i = 0; i < count; i++) { 32 sem.signal(); 33 } 34 35 for (uint i = 0; i < count; i++) { 36 sem.wait(); 37 } 38 } 39 40 static void test_semaphore_single_combined(uint count) { 41 Semaphore sem(0); 42 43 for (uint i = 0; i < count; i++) { 44 sem.signal(); 45 sem.wait(); 46 } 47 } 48 49 static void test_semaphore_many(uint value, uint max, uint increments) { 50 Semaphore sem(value); 51 52 uint total = value; 53 54 for (uint i = value; i + increments <= max; i += increments) { 55 sem.signal(increments); 56 57 total += increments; 58 } 59 60 for (uint i = 0; i < total; i++) { 61 sem.wait(); 62 } 63 } 64 65 TEST(Semaphore, single_separate) { 66 for (uint i = 1; i < 10; i++) { 67 test_semaphore_single_separate(i); 68 } 69 } 70 71 TEST(Semaphore, single_combined) { 72 for (uint i = 1; i < 10; i++) { 73 test_semaphore_single_combined(i); 74 } 75 } 76 77 TEST(Semaphore, many) { 78 for (uint max = 0; max < 10; max++) { 79 for (uint value = 0; value < max; value++) { 80 for (uint inc = 1; inc <= max - value; inc++) { 81 test_semaphore_many(value, max, inc); 82 } 83 } 84 } 85 }