menjrealloc

Menjrealloc is a C programming language function that is part of the memory allocation library. It is used to resize a previously allocated block of memory. The function takes two arguments: a pointer to the existing memory block and the desired new size for that block. If the reallocation is successful, menjrealloc returns a pointer to the resized memory block. This pointer may be the same as the original pointer if the block could be expanded in place, or it may be a new pointer if the memory had to be moved. If the reallocation fails, menjrealloc returns a null pointer, and the original memory block remains unchanged. It is important to check the return value of menjrealloc for null to avoid dereferencing invalid memory. This function is often used when the exact memory requirements are not known at compile time and may change during program execution. It can be more efficient than freeing the old block and allocating a new one, especially if the memory can be resized in place. However, care must be taken to handle potential memory leaks if the original pointer is not updated with the new return value upon successful reallocation.