Alloc

Tcl_Alloc(3)                Tcl Library Procedures                Tcl_Alloc(3)



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NAME
       Tcl_Alloc, Tcl_Free, Tcl_Realloc - allocate or free heap memory

SYNOPSIS
       #include <tcl.h>

       char *
       Tcl_Alloc(size)

       Tcl_Free(ptr)

       char *
       Tcl_Realloc(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
       aligned for any use.

       Tcl_Free makes the space referred to by ptr available for further
       allocation.

       Tcl_Realloc changes the size of the block pointed to by ptr to size
       bytes and returns a pointer to the new block.  The contents will be
       unchanged up to the lesser of the new and old sizes.  The returned
       location may be different from ptr.

KEYWORDS
       alloc, allocation, free, malloc, memory, realloc



Tcl                                   7.5                         Tcl_Alloc(3)