snark13
737c974400
- Split tests/ (libc feature tests) and examples/ (real apps); shared
app.mk in repo root, was examples/example.mk
- libc/io/* split into libc/{conio,env,errno,file,mouse,string,sys,
time,video}/ — clearer module boundaries
- New examples/mdview/: markdown viewer (Phases 1-5 + light nested
lists). Headers (H1-H4), HR, ulist/olist/quote with nesting via
leading spaces, fenced code blocks, inline emphasis (bold/italic/
underscore/code), wrap/unwrap mode with soft wrap (F2), horizontal
pan (← →) with '>' truncation indicator
- libc additions: scroll() in conio (ESTEX SCROLL), strlwr/strupr,
gets() test
- Makefile updates across tests/ for the new shared app.mk path
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
/*
|
|
* atexit + exit + _exit.
|
|
*
|
|
* atexit(fn) — register fn to be called at normal termination (max 8).
|
|
* exit(code) — run the atexit chain in LIFO, then ESTEX EXIT.
|
|
* _exit(code) — POSIX raw exit: skip the chain, go straight to ESTEX.
|
|
*
|
|
* These functions own termination entirely; crt0.s only does inline RST
|
|
* 10h #41 when main returns without an explicit exit(). That path skips
|
|
* the atexit chain — programs that need handlers should call exit() at
|
|
* the bottom of main (or return through a wrapper).
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <sprinter_exit.h>
|
|
|
|
#define ATEXIT_MAX 8
|
|
|
|
static void (*atexit_stack[ATEXIT_MAX])(void);
|
|
static int atexit_top = 0;
|
|
|
|
int atexit(void (*fn)(void))
|
|
{
|
|
if (atexit_top >= ATEXIT_MAX) {
|
|
return -1;
|
|
}
|
|
atexit_stack[atexit_top++] = fn;
|
|
return 0;
|
|
}
|
|
|
|
/* exit() — runs the chain, then performs the raw ESTEX EXIT. */
|
|
void exit(int code)
|
|
{
|
|
while (atexit_top > 0) {
|
|
void (*fn)(void) = atexit_stack[--atexit_top];
|
|
if (fn) {
|
|
fn();
|
|
}
|
|
}
|
|
_exit(code); /* falls into the inline-asm raw exit below */
|
|
}
|
|
|
|
/* _exit() — POSIX raw termination, no atexit chain. */
|
|
void _exit(int code) __naked
|
|
{
|
|
(void)code;
|
|
__asm
|
|
;; HL = code (single int arg).
|
|
ld a, l
|
|
ld b, a
|
|
ld c, #0x41 ; ESTEX EXIT
|
|
rst #0x10
|
|
;; Should not return.
|
|
1$: halt
|
|
jr 1$
|
|
__endasm;
|
|
}
|