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Feature test macros overhaul: signal.h 

Use proper internal macros for BSD sig_t and GNU sighandler_t.

sigaltstack and friends are XSI even in SUSv4 but in glibc are
nonetheless handled as POSIX.1-2008 (not 2001).

The requirement for the ucontext_t typedef in signal.h was XSI prior to
POSIX.1-2008.

Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
This commit is contained in:
Yaakov Selkowitz 2016-03-14 16:39:56 -05:00
parent 25507f80a2
commit 5c78499ae2
2 changed files with 12 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
newlib/libc/include/signal.h
View File

@ -2,15 +2,18 @@
#define _SIGNAL_H_
#include "_ansi.h"
#include <sys/cdefs.h>
#include <sys/signal.h>
_BEGIN_STD_C
typedef int sig_atomic_t; /* Atomic entity type (ANSI) */
#ifndef _POSIX_SOURCE
#if __BSD_VISIBLE
typedef _sig_func_ptr sig_t; /* BSD naming */
#endif
#if __GNU_VISIBLE
typedef _sig_func_ptr sighandler_t; /* glibc naming */
#endif /* !_POSIX_SOURCE */
#endif
#define SIG_DFL ((_sig_func_ptr)0) /* Default action */
#define SIG_IGN ((_sig_func_ptr)1) /* Ignore action */

21
newlib/libc/include/sys/signal.h
View File

@ -13,8 +13,6 @@ extern "C" {
#include <sys/_sigset.h>
#include <sys/_timespec.h>
/* #ifndef __STRICT_ANSI__*/
#if !defined(_SIGSET_T_DECLARED)
#define _SIGSET_T_DECLARED
typedef __sigset_t sigset_t;
@ -77,7 +75,7 @@ typedef struct {
#define SA_NOCLDSTOP 0x1 /* Do not generate SIGCHLD when children stop */
#define SA_SIGINFO 0x2 /* Invoke the signal catching function with */
/* three arguments instead of one. */
#if __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
#if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809
#define SA_ONSTACK 0x4 /* Signal delivery will be on a separate stack. */
#endif
@ -125,7 +123,7 @@ struct sigaction
};
#endif /* defined(__rtems__) */
#if __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
#if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809
/*
* Minimum and default signal stack constants. Allow for target overrides
* from <sys/features.h>.
@ -187,7 +185,7 @@ int _EXFUN(_kill, (pid_t, int));
int _EXFUN(kill, (pid_t, int));
#if defined(__CYGWIN__) || defined(__rtems__)
#if __BSD_VISIBLE || __XSI_VISIBLE >= 4
int _EXFUN(killpg, (pid_t, int));
int _EXFUN(sigaction, (int, const struct sigaction *, struct sigaction *));
int _EXFUN(sigaddset, (sigset_t *, const int));
@ -198,11 +196,10 @@ int _EXFUN(sigemptyset, (sigset_t *));
int _EXFUN(sigpending, (sigset_t *));
int _EXFUN(sigsuspend, (const sigset_t *));
int _EXFUN(sigpause, (int));
#if defined(__CYGWIN__) || defined(__rtems__)
#if __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
int _EXFUN(sigaltstack, (const stack_t *__restrict, stack_t *__restrict));
#endif
#if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809
int _EXFUN(sigaltstack, (const stack_t *__restrict, stack_t *__restrict));
#endif
#if defined(_POSIX_THREADS)
@ -230,10 +227,6 @@ int _EXFUN(sigqueue, (pid_t pid, int signo, const union sigval value));
#endif /* defined(_POSIX_REALTIME_SIGNALS) */
#endif /* defined(__CYGWIN__) || defined(__rtems__) */
/* #endif __STRICT_ANSI__ */
#if defined(___AM29K__)
/* These all need to be defined for ANSI C, but I don't think they are
meaningful. */
@ -354,7 +347,7 @@ int _EXFUN(sigqueue, (pid_t pid, int signo, const union sigval value));
#endif
#if defined(__CYGWIN__)
#if __POSIX_VISIBLE >= 200809
#if __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809
#include <sys/ucontext.h>
#endif
#endif