Separated platform related performance tests from rapidjsontest

Added multiple platform specific file I/O performance tests
Added CheckSum() in platform test as baseline of parsing speed, which should be more appropriate than strlen().

git-svn-id: https://rapidjson.googlecode.com/svn/trunk@26 c5894555-1306-4e8d-425f-1f6f381ee07c

test/perftest/platformtest.cpp

@@ -0,0 +1,152 @@
+#include "perftest.h"
+
+// This file is for giving the performance characteristics of the platform (compiler/OS/CPU).
+
+#if TEST_PLATFORM
+
+#include <cmath>
+#include <fcntl.h>
+
+// Windows
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
+// UNIX
+#if defined(unix) || defined(__unix__) || defined(__unix)
+#include <unistd.h>
+#ifdef _POSIX_MAPPED_FILES
+#include <sys/mman.h>
+#endif
+#endif
+
+class Platform : public PerfTest {
+public:
+	virtual void SetUp() {
+		PerfTest::SetUp();
+
+		// temp buffer for testing
+		temp_ = (char *)malloc(length_ + 1);
+		memcpy(temp_, json_, length_);
+		checkSum_ = CheckSum();
+	}
+
+	char CheckSum() {
+		char c = 0;
+		for (size_t i = 0; i < length_; ++i)
+			c += temp_[i];
+		return c;
+	}
+
+	virtual void TearDown() {
+		PerfTest::TearDown();
+		free(temp_);
+	}
+
+protected:
+	char *temp_;
+	char checkSum_;
+};
+
+TEST_F(Platform, CheckSum) {
+	for (int i = 0; i < kTrialCount; i++)
+		EXPECT_EQ(checkSum_, CheckSum());
+}
+
+TEST_F(Platform, strlen) {
+	for (int i = 0; i < kTrialCount; i++) {
+		size_t l = strlen(json_);
+		EXPECT_EQ(length_, l);
+	}
+}
+
+TEST_F(Platform, memcmp) {
+	for (int i = 0; i < kTrialCount; i++) {
+		EXPECT_EQ(0, memcmp(temp_, json_, length_));
+	}
+}
+
+TEST_F(Platform, pow) {
+	double sum = 0;
+	for (int i = 0; i < kTrialCount * kTrialCount; i++)
+		sum += pow(10.0, i & 255);
+	EXPECT_GT(sum, 0.0);
+}
+
+TEST_F(Platform, Whitespace_strlen) {
+	for (int i = 0; i < kTrialCount; i++) {
+		size_t l = strlen(whitespace_);
+		EXPECT_GT(l, whitespace_length_);
+	}		
+}
+
+TEST_F(Platform, Whitespace_strspn) {
+	for (int i = 0; i < kTrialCount; i++) {
+		size_t l = strspn(whitespace_, " \n\r\t");
+		EXPECT_EQ(whitespace_length_, l);
+	}		
+}
+
+TEST_F(Platform, fread) {
+	for (int i = 0; i < kTrialCount; i++) {
+		FILE *fp = fopen(filename_, "rb");
+		ASSERT_EQ(length_, fread(temp_, 1, length_, fp));
+		EXPECT_EQ(checkSum_, CheckSum());
+		fclose(fp);
+	}
+}
+
+#ifdef _MSC_VER
+TEST_F(Platform, read) {
+	for (int i = 0; i < kTrialCount; i++) {
+		int fd = _open(filename_, _O_BINARY | _O_RDONLY);
+		ASSERT_NE(-1, fd);
+		ASSERT_EQ(length_, _read(fd, temp_, length_));
+		EXPECT_EQ(checkSum_, CheckSum());
+		_close(fd);
+	}
+}
+#else
+TEST_F(Platform, read) {
+	for (int i = 0; i < kTrialCount; i++) {
+		int fd = open(filename_, O_BINARY | O_RDONLY);
+		ASSERT_NE(-1, fd);
+		ASSERT_EQ(length_, read(fd, temp_, length_));
+		EXPECT_EQ(checkSum_, CheckSum());
+		close(fd);
+	}
+}
+#endif
+
+#ifdef _WIN32
+TEST_F(Platform, MapViewOfFile) {
+	for (int i = 0; i < kTrialCount; i++) {
+		HANDLE file = CreateFile(filename_, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+		ASSERT_NE(INVALID_HANDLE_VALUE, file);
+		HANDLE mapObject = CreateFileMapping(file, NULL, PAGE_READONLY, 0, length_, NULL);
+		ASSERT_NE(INVALID_HANDLE_VALUE, mapObject);
+		void *p = MapViewOfFile(mapObject, FILE_MAP_READ, 0, 0, length_);
+		ASSERT_TRUE(p != NULL);
+		EXPECT_EQ(checkSum_, CheckSum());
+		ASSERT_TRUE(UnmapViewOfFile(p) == TRUE);
+		ASSERT_TRUE(CloseHandle(mapObject) == TRUE);
+		ASSERT_TRUE(CloseHandle(file) == TRUE);
+	}
+}
+#endif
+
+#ifdef _POSIX_MAPPED_FILES
+TEST_F(Platform, mmap) {
+	for (int i = 0; i < kTrialCount; i++) {
+		int fd = open(filename_, _O_BINARY | _O_RDONLY);
+		ASSERT_NE(-1, fd);
+		void *p = mmap(NULL, length_, PROT_READ, MAP_PRIVATE, fd, 0);
+		ASSERT_TRUE(p != NULL);
+		EXPECT_EQ(checkSum_, CheckSum());
+		munmap(p, length_);
+		close(fd);
+	}
+}
+#endif
+
+#endif // TEST_PLATFORM