Line data Source code
1 : /******************************************************************************
2 : * $Id$
3 : *
4 : * Project: GDAL Core
5 : * Purpose: Test block cache & writing behaviour under multi-threading
6 : * Author: Even Rouault, <even dot rouault at spatialys dot com>
7 : *
8 : ******************************************************************************
9 : * Copyright (c) 2015, Even Rouault <even dot rouault at spatialys dot com>
10 : *
11 : * Permission is hereby granted, free of charge, to any person obtaining a
12 : * copy of this software and associated documentation files (the "Software"),
13 : * to deal in the Software without restriction, including without limitation
14 : * the rights to use, copy, modify, merge, publish, distribute, sublicense,
15 : * and/or sell copies of the Software, and to permit persons to whom the
16 : * Software is furnished to do so, subject to the following conditions:
17 : *
18 : * The above copyright notice and this permission notice shall be included
19 : * in all copies or substantial portions of the Software.
20 : *
21 : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
22 : * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 : * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
24 : * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25 : * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
26 : * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
27 : * DEALINGS IN THE SOFTWARE.
28 : ****************************************************************************/
29 :
30 : #include "cpl_conv.h"
31 : #include "cpl_multiproc.h"
32 : #include "cpl_string.h"
33 : #include "gdal_priv.h"
34 : #include "test_data.h"
35 :
36 : #include "gtest_include.h"
37 :
38 : namespace
39 : {
40 :
41 : // ---------------------------------------------------------------------------
42 :
43 : class MyRasterBand : public GDALRasterBand
44 : {
45 : int bBusy;
46 :
47 : public:
48 1 : MyRasterBand()
49 1 : {
50 1 : nBlockXSize = 1;
51 1 : nBlockYSize = 1;
52 1 : bBusy = FALSE;
53 1 : }
54 :
55 0 : CPLErr IReadBlock(int, int, void *) CPL_OVERRIDE
56 : {
57 0 : CPLAssert(FALSE);
58 : return CE_Failure;
59 : }
60 :
61 2 : CPLErr IWriteBlock(int nXBlock, int nYBlock, void *) CPL_OVERRIDE
62 : {
63 2 : printf("Entering IWriteBlock(%d, %d)\n", nXBlock, nYBlock);
64 2 : EXPECT_TRUE(!bBusy);
65 2 : bBusy = TRUE;
66 2 : CPLSleep(0.5);
67 2 : bBusy = FALSE;
68 2 : printf("Leaving IWriteBlock(%d, %d)\n", nXBlock, nYBlock);
69 2 : return CE_None;
70 : }
71 : };
72 :
73 : class MyDataset : public GDALDataset
74 : {
75 : public:
76 1 : MyDataset()
77 1 : {
78 1 : eAccess = GA_Update;
79 1 : nRasterXSize = 2;
80 1 : nRasterYSize = 1;
81 1 : SetBand(1, new MyRasterBand());
82 1 : }
83 :
84 2 : ~MyDataset()
85 1 : {
86 1 : FlushCache(true);
87 2 : }
88 : };
89 :
90 1 : static void thread_func1(void * /* unused */)
91 : {
92 1 : printf("begin thread\n");
93 1 : GDALFlushCacheBlock();
94 1 : printf("end of thread\n\n");
95 1 : }
96 :
97 1 : static void test1()
98 : {
99 : CPLJoinableThread *hThread;
100 :
101 1 : printf("Start test1\n");
102 1 : printf("main thread %p\n", (void *)CPLGetPID());
103 :
104 1 : GDALSetCacheMax(0);
105 :
106 1 : MyDataset *poDS = new MyDataset();
107 :
108 1 : char buf1[] = {1};
109 1 : CPL_IGNORE_RET_VAL(GDALRasterIO(GDALGetRasterBand(poDS, 1), GF_Write, 0, 0,
110 : 1, 1, buf1, 1, 1, GDT_Byte, 0, 0));
111 :
112 1 : hThread = CPLCreateJoinableThread(thread_func1, nullptr);
113 1 : CPLSleep(0.3);
114 1 : CPL_IGNORE_RET_VAL(GDALRasterIO(GDALGetRasterBand(poDS, 1), GF_Write, 1, 0,
115 : 1, 1, buf1, 1, 1, GDT_Byte, 0, 0));
116 1 : GDALFlushCacheBlock();
117 :
118 1 : CPLJoinThread(hThread);
119 :
120 1 : delete poDS;
121 1 : printf("End test1\n");
122 1 : }
123 :
124 1 : static void thread_func2(void * /* unused */)
125 : {
126 1 : printf("begin thread %p\n", (void *)CPLGetPID());
127 1 : GDALDatasetH hDS = GDALOpen(TUT_ROOT_DATA_DIR "/byte.tif", GA_ReadOnly);
128 1 : GByte c = 0;
129 1 : CPL_IGNORE_RET_VAL(GDALDataset::FromHandle(hDS)->GetRasterBand(1)->RasterIO(
130 : GF_Read, 0, 0, 1, 1, &c, 1, 1, GDT_Byte, 0, 0, nullptr));
131 1 : GDALClose(hDS);
132 1 : printf("end of thread\n\n");
133 1 : }
134 :
135 1 : static void test2()
136 : {
137 1 : printf("Start test2\n");
138 1 : printf("main thread %p\n", (void *)CPLGetPID());
139 :
140 : CPLJoinableThread *hThread;
141 :
142 1 : CPLSetConfigOption("GDAL_RB_INTERNALIZE_SLEEP_AFTER_DETACH_BEFORE_WRITE",
143 : "0.5");
144 1 : GDALSetCacheMax(1000 * 1000);
145 :
146 1 : auto poDS = GetGDALDriverManager()->GetDriverByName("GTiff")->Create(
147 : "/vsimem/foo.tif", 1, 1, 2, GDT_Byte, nullptr);
148 1 : poDS->GetRasterBand(1)->Fill(0);
149 1 : poDS->GetRasterBand(2)->Fill(0);
150 1 : poDS->FlushCache(false);
151 1 : GDALSetCacheMax(0);
152 :
153 1 : poDS->GetRasterBand(1)->Fill(1);
154 1 : hThread = CPLCreateJoinableThread(thread_func2, nullptr);
155 1 : CPLSleep(0.2);
156 :
157 1 : GByte c = 0;
158 1 : CPL_IGNORE_RET_VAL(poDS->GetRasterBand(1)->RasterIO(
159 : GF_Read, 0, 0, 1, 1, &c, 1, 1, GDT_Byte, 0, 0, nullptr));
160 1 : printf("%d\n", c);
161 1 : ASSERT_EQ(c, 1);
162 1 : CPLJoinThread(hThread);
163 :
164 1 : CPLSetConfigOption("GDAL_RB_INTERNALIZE_SLEEP_AFTER_DETACH_BEFORE_WRITE",
165 : nullptr);
166 1 : delete poDS;
167 1 : VSIUnlink("/vsimem/foo.tif");
168 1 : printf("End test2\n");
169 : }
170 :
171 : // ---------------------------------------------------------------------------
172 :
173 4 : TEST(testblockcachelimits, test)
174 : {
175 1 : CPLSetConfigOption("GDAL_DEBUG_BLOCK_CACHE", "ON");
176 1 : GDALGetCacheMax();
177 :
178 1 : GDALAllRegister();
179 :
180 1 : test1();
181 1 : test2();
182 :
183 1 : GDALDestroyDriverManager();
184 1 : }
185 :
186 : } // namespace
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