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SRS5: Improve file writer performance by fwrite with cache. v5.0.133 (#3308)

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* SrsFileWriter leverages libc buffer to boost dvr write speed.

* Refactor SrsFileWriter to use libc file functions mockable

* Add utest and refine code.

Co-authored-by: winlin <winlin@vip.126.com>

PICK 25eb21efe8
This commit is contained in:
stone 2023-01-08 12:05:37 +08:00 • committed by winlin
parent f06a2d61f7
commit 748aa8508f
9 changed files with 358 additions and 62 deletions
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59
trunk/src/utest/srs_utest_kernel2.cpp
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@ -352,3 +352,62 @@ VOID TEST(KernelLogTest, LogLevelStringV2)
EXPECT_EQ(srs_get_log_level_v2("off"), SrsLogLevelDisabled);
}
VOID TEST(KernelFileWriterTest, RealfileTest)
{
srs_error_t err;
string filename = "./test-realfile.log";
MockFileRemover disposer(filename);
if (true) {
SrsFileWriter f;
HELPER_EXPECT_SUCCESS(f.open(filename));
EXPECT_TRUE(f.is_open());
EXPECT_EQ(0, f.tellg());
HELPER_EXPECT_SUCCESS(f.write((void*) "HelloWorld", 10, NULL));
EXPECT_EQ(10, f.tellg());
f.seek2(5);
EXPECT_EQ(5, f.tellg());
HELPER_EXPECT_SUCCESS(f.write((void*) "HelloWorld", 10, NULL));
EXPECT_EQ(15, f.tellg());
off_t v = 0;
HELPER_EXPECT_SUCCESS(f.lseek(0, SEEK_CUR, &v));
EXPECT_EQ(15, v);
HELPER_EXPECT_SUCCESS(f.lseek(0, SEEK_SET, &v));
EXPECT_EQ(0, v);
HELPER_EXPECT_SUCCESS(f.lseek(10, SEEK_SET, &v));
EXPECT_EQ(10, v);
HELPER_EXPECT_SUCCESS(f.lseek(0, SEEK_END, &v));
EXPECT_EQ(15, v);
// There are 5 bytes empty lagging in file.
HELPER_EXPECT_SUCCESS(f.lseek(5, SEEK_END, &v));
EXPECT_EQ(20, v);
HELPER_EXPECT_SUCCESS(f.write((void*) "HelloWorld", 10, NULL));
EXPECT_EQ(30, f.tellg());
HELPER_EXPECT_SUCCESS(f.lseek(0, SEEK_SET, &v));
EXPECT_EQ(0, v);
HELPER_EXPECT_SUCCESS(f.write((void*) "HelloWorld", 10, NULL));
EXPECT_EQ(10, f.tellg());
}
SrsFileReader fr;
HELPER_ASSERT_SUCCESS(fr.open(filename));
// "HelloWorldWorld\0\0\0\0\0HelloWorld"
string str;
HELPER_ASSERT_SUCCESS(srs_ioutil_read_all(&fr, str));
EXPECT_STREQ("HelloWorldWorld", str.c_str());
EXPECT_STREQ("HelloWorld", str.substr(20).c_str());
}