From 4abab5ad6c8465a7528ccdd5f49367da05f78bbd Mon Sep 17 00:00:00 2001 From: Vladimir Azarov Date: Tue, 1 Oct 2024 15:47:05 +0200 Subject: Initial version --- src/exit/at_quick_exit.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 src/exit/at_quick_exit.c (limited to 'src/exit/at_quick_exit.c') diff --git a/src/exit/at_quick_exit.c b/src/exit/at_quick_exit.c new file mode 100644 index 0000000..e4b5d78 --- /dev/null +++ b/src/exit/at_quick_exit.c @@ -0,0 +1,33 @@ +#include +#include "libc.h" +#include "lock.h" +#include "fork_impl.h" + +#define COUNT 32 + +static void (*funcs[COUNT])(void); +static int count; +static volatile int lock[1]; +volatile int *const __at_quick_exit_lockptr = lock; + +void __funcs_on_quick_exit() +{ + void (*func)(void); + LOCK(lock); + while (count > 0) { + func = funcs[--count]; + UNLOCK(lock); + func(); + LOCK(lock); + } +} + +int at_quick_exit(void (*func)(void)) +{ + int r = 0; + LOCK(lock); + if (count == 32) r = -1; + else funcs[count++] = func; + UNLOCK(lock); + return r; +} -- cgit v1.2.3