INTERNAL_SIZE_T prev_size;/* Size of previous chunk (if free). */INTERNAL_SIZE_T size;/* Size in bytes, including overhead. */structmalloc_chunk* fd;/* double links -- used only if free. */structmalloc_chunk* bk;/* Only used for large blocks: pointer to next larger size. */s...
struct malloc_chunk{INTERNAL_SIZE_Tprev_size;/* Size of previous chunk (if free). */INTERNAL_SIZE_Tsize;/* Size in bytes, including overhead. */struct malloc_chunk*fd;/* double links -- used only if free. */struct malloc_chunk*bk;/* Only used for large blocks: pointer to next l...
mallocreturns a void pointer to the allocated space, orNULLif there is insufficient memory available. To return a pointer to a type other thanvoid, use a type cast on the return value. The storage space pointed to by the return value is guaranteed to be suitably aligned for storage of any...
8. /* Only used for large blocks: pointer to next larger size. */ 9. struct malloc_chunk* fd_nextsize; /* double links -- used only if free. */ 10. struct malloc_chunk* bk_nextsize; 11.}; chunk 的定义相当简单明了,对各个域做一下简单介绍 : ...
mallocreturns a void pointer to the allocated space, orNULLif there is insufficient memory available. To return a pointer to a type other thanvoid, use a type cast on the return value. The storage space pointed to by the return value is guaranteed to be suitably aligned for storage of any...
mallocreturns a void pointer to the allocated space, orNULLif there is insufficient memory available. To return a pointer to a type other thanvoid, use a type cast on the return value. The storage space pointed to by the return value is guaranteed to be suitably aligned for storage of any...
/* Only used for large blocks: pointer to next larger size. */ structmalloc_chunk*fd_nextsize;/* double links -- used only if free. */ structmalloc_chunk*bk_nextsize; }; 我们在开发中每次调用 malloc 申请内存的时候,分配器都会给我们分配一个大小合适的 chunk 出来,把 body 部分的 user da...
pointer returned points to the start (lowest byte address) of the allocated space. If the space cannot be allocated, a null pointer is returned. If the size of the space requested is zero, the behavior is implementation-defined: either a null pointer is returned to indicate an error, or ...
(if free). */INTERNAL_SIZE_Tsize;/* Size in bytes, including overhead. */struct malloc_chunk*fd;/* double links -- used only if free. */struct malloc_chunk*bk;/* Only used for large blocks: pointer to next larger size. */struct malloc_chunk*fd_nextsize;/* double links -- ...
malloc returns a void pointer to the allocated space, or NULL if there is insufficient memory available. To return a pointer to a type other than void, use a type cast on the return value. The storage space pointed to by the return value is guaranteed to be suitably aligned for storage ...