Squashed 'src/leveldb/' changes from a31c8aa40..196962ff0

196962ff0 Add AcceleratedCRC32C to port_win.h
1bdf1c34c Merge upstream LevelDB v1.20
d31721eb0 Merge #17: Fixed file sharing errors
fecd44902 Fixed file sharing error in Win32Env::GetFileSize(), Win32SequentialFile::_Init(), Win32RandomAccessFile::_Init() Fixed error checking in Win32SequentialFile::_Init()
5b7510f1b Merge #14: Merge upstream LevelDB 1.19
0d969fd57 Merge #16: [LevelDB] Do no crash if filesystem can't fsync
c8c029b5b [LevelDB] Do no crash if filesystem can't fsync
a53934a3a Increase leveldb version to 1.20.
f3f139737 Separate Env tests from PosixEnv tests.
eb4f0972f leveldb: Fix compilation warnings in port_posix_sse.cc on x86 (32-bit).
d0883b600 Fixed path to doc file: index.md.
7fa20948d Convert documentation to markdown.
ea175e28f Implement support for Intel crc32 instruction (SSE 4.2)
95cd743e5 Including <limits> for std::numeric_limits.
646c3588d Limit the number of read-only files the POSIX Env will have open.
d40bc3fa5 Merge #13: Typo
ebbd772d3 Typo
a2fb086d0 Add option for max file size. The currend hard-coded value of 2M is inefficient in colossus.

git-subtree-dir: src/leveldb
git-subtree-split: 196962ff01c39b4705d8117df5c3f8c205349950

1 files changed, 66 insertions, 0 deletions

diff --git a/util/env_posix_test.cc b/util/env_posix_test.cc
new file mode 100644
index 0000000000..295f8ae440
--- /dev/null
+++ b/util/env_posix_test.cc
@@ -0,0 +1,66 @@
+// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file. See the AUTHORS file for names of contributors.
+
+#include "leveldb/env.h"
+
+#include "port/port.h"
+#include "util/testharness.h"
+#include "util/env_posix_test_helper.h"
+
+namespace leveldb {
+
+static const int kDelayMicros = 100000;
+static const int kReadOnlyFileLimit = 4;
+static const int kMMapLimit = 4;
+
+class EnvPosixTest {
+ public:
+  Env* env_;
+  EnvPosixTest() : env_(Env::Default()) { }
+
+  static void SetFileLimits(int read_only_file_limit, int mmap_limit) {
+    EnvPosixTestHelper::SetReadOnlyFDLimit(read_only_file_limit);
+    EnvPosixTestHelper::SetReadOnlyMMapLimit(mmap_limit);
+  }
+};
+
+TEST(EnvPosixTest, TestOpenOnRead) {
+  // Write some test data to a single file that will be opened |n| times.
+  std::string test_dir;
+  ASSERT_OK(env_->GetTestDirectory(&test_dir));
+  std::string test_file = test_dir + "/open_on_read.txt";
+
+  FILE* f = fopen(test_file.c_str(), "w");
+  ASSERT_TRUE(f != NULL);
+  const char kFileData[] = "abcdefghijklmnopqrstuvwxyz";
+  fputs(kFileData, f);
+  fclose(f);
+
+  // Open test file some number above the sum of the two limits to force
+  // open-on-read behavior of POSIX Env leveldb::RandomAccessFile.
+  const int kNumFiles = kReadOnlyFileLimit + kMMapLimit + 5;
+  leveldb::RandomAccessFile* files[kNumFiles] = {0};
+  for (int i = 0; i < kNumFiles; i++) {
+    ASSERT_OK(env_->NewRandomAccessFile(test_file, &files[i]));
+  }
+  char scratch;
+  Slice read_result;
+  for (int i = 0; i < kNumFiles; i++) {
+    ASSERT_OK(files[i]->Read(i, 1, &read_result, &scratch));
+    ASSERT_EQ(kFileData[i], read_result[0]);
+  }
+  for (int i = 0; i < kNumFiles; i++) {
+    delete files[i];
+  }
+  ASSERT_OK(env_->DeleteFile(test_file));
+}
+
+}  // namespace leveldb
+
+int main(int argc, char** argv) {
+  // All tests currently run with the same read-only file limits.
+  leveldb::EnvPosixTest::SetFileLimits(leveldb::kReadOnlyFileLimit,
+                                       leveldb::kMMapLimit);
+  return leveldb::test::RunAllTests();
+}