Tcl_Alloc, Tcl_Free, Tcl_Realloc, Tcl_AttemptAlloc, Tcl_AttemptRealloc,
       ckalloc, ckfree, ckrealloc, attemptckalloc, attemptckrealloc - allocate
       or free heap memory

SYNOPSIS

       #include <tcl.h>

       char *
       Tcl_Alloc(size)

       void
       Tcl_Free(ptr)

       char *
       Tcl_Realloc(ptr, size)

       char *
       Tcl_AttemptAlloc(size)

       char *
       Tcl_AttemptRealloc(ptr, size)

       char *
       ckalloc(size)

       void
       ckfree(ptr)

       char *
       ckrealloc(ptr, size)

       char *
       attemptckalloc(size)

       char *
       attemptckrealloc(ptr, size)

ARGUMENTS

       int    size    (in)      Size in bytes of the memory block to allocate.

       char   *ptr    (in)      Pointer to memory block to free or realloc.
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DESCRIPTION

       These procedures provide a platform and compiler independent  interface
       for  memory  allocation.   Programs  that need to transfer ownership of
       memory blocks between Tcl and other modules should use  these  routines
       rather  than  the native malloc() and free() routines provided by the C
       run-time library.

       Tcl_Alloc returns a pointer to a block of at least size bytes  suitably
       return  NULL.   Note  that  on some platforms, attempting to allocate a
       block of memory will also cause these functions to return NULL.

       The  procedures  ckalloc,  ckfree,   ckrealloc,   attemptckalloc,   and
       attemptckrealloc  are  implemented  as macros.  Normally, they are syn-
       onyms for the corresponding procedures documented on this  page.   When
       Tcl  and  all  modules  calling  Tcl  are  compiled  with TCL_MEM_DEBUG
       defined, however, these macros are redefined to  be  special  debugging
       versions  of  of  these  procedures.  To support Tcl's memory debugging
       within a module, use the macros rather than direct calls to  Tcl_Alloc,
       etc.

KEYWORDS

       alloc, allocation, free, malloc, memory, realloc, TCL_MEM_DEBUG



Tcl                                   7.5                         Tcl_Alloc(3)