PSS_ALLOCATOR structure (processsnapshot.h)

Specifies custom functions which the Process Snapshotting functions use to allocate and free the internal walk marker structures.

Syntax

typedef struct {
  void  *Context;
  void  )(void *Context,DWORD Size)  *(*AllocRoutine;
  void((void *Context, void *Address) * )FreeRoutine;
} PSS_ALLOCATOR;

Members

Context

An arbitrary pointer-sized value that the Process Snapshotting functions pass to AllocRoutine and FreeRoutine.

AllocRoutine

A pointer to a WINAPI-calling convention function that takes two parameters. It returns a pointer to the block of memory that it allocates, or NULL if allocation fails.

Context

The context value, as passed in PSS_ALLOCATOR.

Size

Number of bytes to allocate.

FreeRoutine

A pointer to a WINAPI-calling convention function taking two parameters. It deallocates a block of memory that AllocRoutine allocated.

Context

The context value, as passed in PSS_ALLOCATOR.

Address

The address of a block of memory that AllocRoutine allocated.

Remarks

To use custom memory allocation functions, pass this structure to PssWalkMarkerCreate. Otherwise, the Process Snapshotting functions use the default process heap.

The PSS_ALLOCATOR structure that provides the custom functions should remain valid for the lifetime of the walk marker that PssWalkMarkerCreate creates.

FreeRoutine must accept NULL address parameters without failing.

The custom functions are called from PssWalkMarkerCreate, PssWalkMarkerFree and PssWalkSnapshot using the same thread that calls PssWalkMarkerCreate, PssWalkMarkerFree and PssWalkSnapshot. Therefore the custom functions need not be multi-threaded.

Requirements

Requirement	Value
Minimum supported client	Windows 8.1 [desktop apps only]
Minimum supported server	Windows Server 2012 R2 [desktop apps only]
Header	processsnapshot.h

See also

Process Snapshotting