Module allocator 

C ABI allocator compatibility — xmlMemSetup, xmlMemGet, xmlMalloc, xmlFree, etc. (§58).

This module implements the complete memory hook system exposed by libxml2:

• Global allocator function pointers (malloc, realloc, free, strdup)
• xmlMemSetup() / xmlMemGet() — set/get allocator hooks
• xmlGcMemSetup() / xmlGcMemGet() — GC-aware allocator hooks (wrappers)
• xmlMalloc() / xmlMallocAtomic() / xmlRealloc() / xmlFree() / xmlMemStrdup()
• xmlMemUsed() / xmlMemBlocks() — allocation tracking
• xmlMemDisplay() / xmlMemShow() — debugging output

Phase 1 status

Complete — all allocator APIs are implemented with thread-safe global state.

Safety

Allocator hooks are unsafe because they operate on raw pointers and are called from C code. Every public function documents its safety contract.

Statics

xmlFree

xmlFreeFunc xmlFree — the free hook.

xmlMalloc

xmlMallocFunc xmlMalloc — the malloc hook (default: xmlMallocImpl).

xmlMallocAtomic

xmlMallocFunc xmlMallocAtomic — the atomic-malloc hook.

xmlMemStrdup

xmlStrdupFunc xmlMemStrdup — the strdup hook.

xmlRealloc

xmlReallocFunc xmlRealloc — the realloc hook.

Functions

xmlCleanupMemory

Clean up the memory layer.

xmlFreeImpl^⚠

Free allocated memory.

xmlGcMemGet^⚠

Get GC-aware memory allocator functions.

xmlGcMemSetup^⚠

Set GC-aware memory allocator functions.

xmlInitMemory

Initialize the memory layer with debugging support.

xmlMallocAtomicImpl^⚠

Allocate memory that will never contain pointers to other memory.

xmlMallocAtomicLoc^⚠

Allocate zeroed memory, recording the allocation site (upstream xmlmemory.h).

xmlMallocAtomicZero^⚠

Allocate zero-initialized memory (atomic variant).

xmlMallocImpl^⚠

Allocate memory.

xmlMallocLoc^⚠

Allocate memory, recording the allocation site (upstream xmlmemory.h).

xmlMallocZero^⚠

Allocate zero-initialized memory.

xmlMemBlocks

Return the current number of allocated blocks (approximate).

xmlMemDisplay^⚠

Display memory allocation information to a file.

xmlMemDisplayLast^⚠

Display a limited amount of memory debug information (upstream xmlmemory.h).

xmlMemFree^⚠

Free memory (legacy name; same contract as xmlFree).

xmlMemGet^⚠

Get the current memory allocator functions.

xmlMemMalloc^⚠

Allocate memory (legacy name; same contract as xmlMalloc).

xmlMemRealloc^⚠

Reallocate memory (legacy name; same contract as xmlRealloc).

xmlMemSetup^⚠

Set custom memory allocator functions.

xmlMemShow^⚠

Show memory allocation information.

xmlMemSize^⚠

Return the size of an allocated block (upstream xmlmemory.h).

xmlMemStrdupImpl^⚠

Duplicate a C string using the configured allocator.

xmlMemStrdupLoc^⚠

Duplicate a string, recording the allocation site (upstream xmlmemory.h).

xmlMemUsed

Return the total amount of memory currently allocated (approximate).

xmlMemoryDump^⚠

Dump memory allocation statistics (upstream xmlmemory.h).

xmlMemoryStrdup^⚠

Duplicate a string (legacy name; same contract as xmlMemStrdup).

xmlReallocImpl^⚠

Reallocate memory.

xmlReallocLoc^⚠

Reallocate memory, recording the allocation site (upstream xmlmemory.h).

xmlReallocZero^⚠

Reallocate and zero-initialize the new portion.