Re: [問題] 存取實體記憶體的方法?

看板Programming作者FredLu.時間18年前 (2007/06/23 21:01)推噓0(0推 0噓 0→)

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==> typeotoco.bbs@ptt.cc (打字男) 提到: > 請問一下如何用 c或asm 去存取到實體記憶體呢？ > 我有這個需求，但對這方面觀念還不是很瞭解 > 希望能夠獲得一些指點 > 若有人可以寫幾行給小的參考也會對我很有幫助 > 感謝請參考 Borland C++ Builder 的 new 指令,可以取代以前的 malloc(), The new operators offer dynamic storage allocation, similar but superior to the standard library function malloc. These allocation functions attempt to allocate size bytes of storage. If successful, new returns a pointer to the allocated memory. If the allocation fails, the new operator will call the new_handler function. The default behavior of new_handler is to throw an exception of type bad_alloc. If you do not want an exception to be thrown, use the nothrow version of operator new. The nothrow versions return a null pointer result on failure, instead of throwing an exception. The default placement forms of operator new are reserved and cannot be redefined. You can, however, overload the placement form with a different signature (i.e. one having a different number, or different type of arguments). The default placement forms accept a pointer of type void, and perform no action other than to return that pointer, unchanged. This can be useful when you want to allocate an object at a known address. Using the placement form of new can be tricky, as you must remember to explicitly call the destructor for your object, and then free the pre-allocated memory buffer. Do not call the delete operator on an object allocated with the placement new operator. A request for non-array allocation uses the appropriate operator new() function. Any request for array allocation will call the appropriate operator new[]() function. Remember to use the array form of operator delete[](), when deallocating an array created with operator new[](). Note: Arrays of classes require that a default constructor be defined in the class. A request for allocation of 0 bytes returns a non-null pointer. Repeated requests for zero-size allocations return distinct, non-null pointers. -- 在每個人剛出生的時候 , 神早已為人類世界留下了伏筆 . 個人網頁 http://myweb.hinet.net/home4/l1032265/index.htm -- ☆ [Origin:椰林風情] [From: 122-124-13-219.dynamic.hine] [Login: **] [Post: **]