Mistake # 1 : Using a shared pointer where an unique pointer suffices !!! 错误#1:使用共享指针,其中一个唯一的指针就足够了! I’ve recently been working in an inherited codebase which uses a shared_ptr for creating and managing every object. When I analyzed the code, I found that in 90%...
printf( "\nreset_cb: Address of Array:%p, \t Array pointer Size:%d \n\n", cbStru_ptr, sizeof(cbStru_ptr->rt_arr)); return 0; } int gc_cb(struct cbuff *cbStru_ptr) { if(cbStru_ptr == NULL) { puts("gc_cb: pointer null\n"); return -1; } free(cbStru_ptr); return...
Conversion From MultiByte to Unicode character set conversion to void * in C and C++ Conversions from DWORD to Char[] Convert _TCHAR* variable to CString Convert a DLL to static Lib convert BYTE to _TCHAR Convert char * to LPCTSTR Convert char* to System::String^ convert const char * to ...
你可以使用shared_ptr.get()这个api从一个shared_ptr获得一个裸指针的句柄。然而,这是非常冒险的,应该尽量避免这种情况。看看下面这段代码: C++ 1 2 3 4 5 6 7 voidStartJob() { shared_ptr<aircraft>pAircraft(newAircraft("F-16")); Aircraft*myAircraft=pAircraft.get();// returns the raw pointer ...
released or transferred inside the function. If the function uses its parameter only to access the resource, it's safe to pass a raw pointer or a reference. For more information, seeC++ Core Guidelines rule R.33:Take a unique_ptr<widget>& parameter to express that a function reseats the...
(size_ti=0;i<ntHeaders->FileHeader.NumberOfSections;i++){LPVOIDsectionDestination=(LPVOID)((DWORD_PTR)dll_base+(DWORD_PTR)section->VirtualAddress);LPVOIDsectionBytes=(LPVOID)((DWORD_PTR)dll_bytes+(DWORD_PTR)section->PointerToRawData);memcpy(sectionDestination,sectionBytes,section->SizeOfRawData...
{ // 从C char* 到 Go string 类型转换 return _cgo_runtime_gostring(p)}//go:linkname gostringfunc gostring(p *byte) string { // 底层实现 l := findnull(p) if l == 0 { return "" } s, b := rawstring(l) memmove(unsafe.Pointer(&b[0]), unsafe.Pointer(p), uintptr(l)) ...
int, mode : c.char) -> rawptr --- zip_close :: proc(zip : rawptr) --- zip_entry_open :: proc(zip : rawptr, entryname : cstring) -> c.int --- zip_entry_close :: proc(zip : rawptr) -> c.int --- zip_entry_write :: proc(zip : rawptr, buf : rawptr, bufsize :...
s, b := rawstring(l) memmove(unsafe.Pointer(&b[0]), unsafe.Pointer(p), uintptr(l)) return s } 3.3.2、更高效的字符串传递方法 C.CString 简单安全,但是它涉及了一次从 Go 到 C 空间的内存拷贝,对于长字符串而言这会是难以忽视的开销。
unique_ptr 是 C++11 才开始提供的类型,是一种在异常时可以帮助避免资源泄漏的智能指针。采用独占式拥有,意味着可以确保一个对象和其相应的资源同一时间只被一个 pointer 拥有。一旦拥有着被销毁或编程 empty,或开始拥有另一个对象,先前拥有的那个对象就会被销毁,其任何相应资源亦会被释放。