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#ifndef __RECLAIM_H__
#define __RECLAIM_H__
/* The Erlang release for VxWorks includes a simple mechanism for
"resource reclamation" at task exit - it allows replacement of the
functions that open/close "files" and malloc/free memory with versions
that keep track, to be able to "reclaim" file descriptors and memory
when a task exits (regardless of *how* it exits).
The interface to this mechanism is made available via this file,
with the following caveats:
- The interface may change (or perhaps even be removed, though that
isn't likely until VxWorks itself provides similar functionality)
in future releases - i.e. you must always use the version of this
file that comes with the Erlang release you are using.
- Disaster is guaranteed if you use the mechanism incorrectly (see
below for the correct way), e.g. allocate memory with the "tracking"
version of malloc() and free it with the "standard" version of free().
- The mechanism (of course) incurs some performance penalty - thus
for a simple program you may be better off with careful programming,
making sure that you do whatever close()/free()/etc calls that are
appropriate at all exit points (though if you need to guard against
taskDelete() etc, things get messy...).
To use the mechanism, simply program your application normally, i.e.
use open()/close()/malloc()/free() etc as usual, but #include this
file before any usage of the relevant functions. NOTE: To avoid the
"disaster" mentioned above, you *must* #include it in *all* (or none)
of the files that manipulate a particular file descriptor, allocated
memory area, etc. Finally, note that you can obviously not load your
application before the Erlang system when using this interface.
*/
/* Sorry, no ANSI prototypes yet... */
extern int save_open(),save_creat(),save_socket(),save_accept(),save_close();
#define open save_open
#define creat save_creat
#define socket save_socket
#define accept save_accept
#define close save_close
extern FILE *save_fopen(), *save_fdopen(), *save_freopen();
extern int save_fclose();
#define fopen save_fopen
#define fdopen save_fdopen
#define freopen save_freopen
#define fclose save_fclose
/* XXX Should do opendir/closedir too... */
extern char *save_malloc(), *save_calloc(), *save_realloc();
extern void save_free(), save_cfree();
#define malloc save_malloc
#define calloc save_calloc
#define realloc save_realloc
#define free save_free
#define cfree save_cfree
#endif
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