Add wgc demo

log_helper.cpp

@@ -0,0 +1,60 @@
+#include "log_helper.h"
+
+#include <share.h>
+#include <stdarg.h>
+#include <stdio.h>
+
+#include <mutex>
+
+#define AMLOCK(A) std::lock_guard<std::mutex> lock(A)
+
+#define LOG_ROLL_SIZE (1024 * 1024)
+
+AMLog* AMLog::_log = NULL;
+std::mutex _lock;
+
+AMLog::AMLog(FILE* handle) : _handle(handle) { _log = this; }
+
+AMLog::~AMLog() {
+  AMLOCK(_lock);
+  if (_log && _handle) {
+    fclose(_handle);
+    _log = NULL;
+  }
+}
+
+AMLog* AMLog::get(const char* path) {
+  if (_log || !path) {
+    return _log;
+  }
+  // DWORD size = 0;
+  // HANDLE file = CreateFile(path, GENERIC_READ, 0, NULL, OPEN_EXISTING,
+  // FILE_ATTRIBUTE_NORMAL, 	NULL); if (file != INVALID_HANDLE_VALUE) {
+  // size = GetFileSize(file, NULL); 	CloseHandle(file);
+  // }
+  // if (size != INVALID_FILE_SIZE && size > LOG_ROLL_SIZE) {
+  // 	if (DeleteFileA(path) == FALSE) {
+  // 		TCHAR roll_path[MAX_PATH];
+  // 		sprintf_s(roll_path, MAX_PATH, "%s.1", path);
+  // 		if (!MoveFileEx(path, roll_path, MOVEFILE_REPLACE_EXISTING)) {
+  // 			return NULL;
+  // 		}
+  // 	}
+  // }
+  // FILE* handle = _fsopen(path, "a+", _SH_DENYNO);
+  // if (!handle) {
+  // 	return NULL;
+  // }
+  // _log = new AMLog(handle);
+  return _log;
+}
+
+void AMLog::printf(const char* format, ...) {
+  AMLOCK(_lock);
+  va_list args;
+
+  va_start(args, format);
+  vfprintf(_handle, format, args);
+  va_end(args);
+  fflush(_handle);
+}