From 3534b428629be185e096be99e3bd5fdfe32d5544 Mon Sep 17 00:00:00 2001 From: Laurent Bercot Date: Thu, 18 Sep 2014 18:55:44 +0000 Subject: initial commit with rc for skalibs-2.0.0.0 --- src/libstddjb/sig_stack.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 src/libstddjb/sig_stack.c (limited to 'src/libstddjb/sig_stack.c') diff --git a/src/libstddjb/sig_stack.c b/src/libstddjb/sig_stack.c new file mode 100644 index 0000000..c414a88 --- /dev/null +++ b/src/libstddjb/sig_stack.c @@ -0,0 +1,29 @@ +/* ISC license. */ + +/* MT-unsafe */ + +#include +#include +#include +#include + +static struct skasigaction skasigstack[NSIG][SIGSTACKSIZE] ; +static unsigned int sigsp[NSIG] ; + +int sig_pusha (int sig, struct skasigaction const *ssa) +{ + if ((sig <= 0) || (sig > NSIG)) return (errno = EINVAL, -1) ; + if (sigsp[sig-1] >= SIGSTACKSIZE) return (errno = ENOBUFS, -1) ; + if (skasigaction(sig, ssa, &skasigstack[sig-1][sigsp[sig-1]]) == -1) + return -1 ; + return ++sigsp[sig-1] ; +} + +int sig_pop (int sig) +{ + if ((sig <= 0) || (sig > NSIG)) return (errno = EINVAL, -1) ; + if (!sigsp[sig-1]) return (errno = EFAULT, -1); + if (skasigaction(sig, &skasigstack[sig-1][sigsp[sig-1]-1], 0) == -1) + return -1 ; + return --sigsp[sig-1] ; +} -- cgit v1.3.1