Calls an application-supplied function for all _CLIENT_BLOCK types in the heap (debug version only).
The _CrtDoForAllClientObjects function searches the heap's linked list for memory blocks with the _CLIENT_BLOCK type and calls the application-supplied function when a block of this type is found. The found block and the context parameter are passed as arguments to the application-supplied function. During debugging, an application can track a specific group of allocations by explicitly calling the debug heap functions to allocate the memory and specifying that the blocks be assigned the _CLIENT_BLOCK block type. These blocks can then be tracked separately and reported on differently during leak detection and memory state reporting.
If the _CRTDBG_ALLOC_MEM_DF bit field of the _crtDbgFlag flag is not turned on, _CrtDoForAllClientObjects immediately returns. When _DEBUG is not defined, calls to _CrtDoForAllClientObjects are removed during preprocessing.
For more information about the _CLIENT_BLOCK type and how it can be used by other debug functions, see Types of Blocks on the Debug Heap. For information about how memory blocks are allocated, initialized, and managed in the debug version of the base heap, see CRT Debug Heap Details.
If pfn is NULL, the invalid parameter handler is invoked, as described in Parameter Validation. If execution is allowed to continue, errno, _doserrno, _sys_errlist, and _sys_nerr is set to EINVAL and the function returns.
Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.