另外c的realloc高效的一大原因是当大小超过page size的时候底层可以是用mremap实现的（mremap: This can be used to implement a very efficient realloc.），即使无法在原地址(virtual address space)后面扩展，也不一定需要复制全部数据，而是把一整个页重映射到另一个页，在这种
然而，realloc()只能保证在malloc()之类的函数分配的数组上正常工作，在分配的内存中不能有具备用户自定...
realloc it to hold 5 ints (int *new_arr = realloc(arr, 5 * sizeof(int));). CRITICAL: Check if new_arr is NULL. If not, update your pointer (arr = new_arr;) and use the larger array. free the final pointer (arr). Tip: Handle realloc failure carefully: don't lose the ...
DCL12-C Implement abstract data types using opaque types. DCL13-C Declare function parameters that are pointers to values not changed by the function as const. DCL15-C Declare file-scope objects or functions that do not need external linkage as static. DCL16-C Use "L," not "l,...
FILE *pFile; char **ppText = NULL; // 二维动态数组指针 char *pCurrText = NULL; // 指向当前输入字符串的指针 ULONG ulCurrLines = 0; ULONG ulAllocedLines = 0;while (p = getline(pFile)) { if (ulCurrLines >= ulAllocedLines) { // * 当前竖向空间已经不够了,通过realloc对其进行扩展。
test program has freed the same block twice. As with the illegal read/write errors, Memcheck attempts to make sense of the address free'd. If, as here, the address is one which has previously been freed, you wil be told that -- making duplicate frees of the same block easy to spot...
A modern, user friendly, generic, type-safe and fast C99 container library: String, Vector, Sorted and Unordered Map and Set, Deque, Forward List, Smart Pointers, Bitset and Random numbers. - - Added old_size parameter to c_realloc() (c_free() will be do
void *agalloc(Agraph_t *g, size_t request); void *agrealloc(Agraph_t *g, void *ptr, size_t oldsize, size_t newsize); void agfree(Agraph_t *g, void *ptr); Strings char *agstrdup(Agraph_t *, char *); char *agstrdup_html(Agraph_t *, char *); int aghtmlstr(char *)...
exr_result_t(*realloc_nonimage_data_fn)(struct_exr_decode_pipeline*pipeline) Function which can be provided if you have bespoke handling for non-image data and need to re-allocate the data to handle the about-to-be unpacked data. If left NULL, will assume the memory pointed to by the...
to implement <resource> */ #define MAX_ENTITIES 20 staticchar *testEntitiesName[MAX_ENTITIES; static char *testEntities[_ENTITIES]; staticint nb_entities = 0; static void resetEntities(void { inti; for(i = 0;i < nb_entities;i++) { if (testEntities...