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2011-10-06 Christian Franke <franke@computer.org>

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* include/cygwin/wait.h: Use new __wait_status_to_int()
	macro to access status value in W*() status checks.
	Fix status description.
	* include/sys/wait.h: Allow `int' and `union wait' as
	wait status parameter.  Change __wait_status_to_int()
	macro and wait () prototypes accordingly.  Add inline
	functions for C++.  Remove extra `;'.
This commit is contained in:
Christian Franke
2011-10-06 16:02:37 +00:00
parent e402890df2
commit efe716bb8e
3 changed files with 73 additions and 17 deletions
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56
winsup/cygwin/include/sys/wait.h
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@ -1,6 +1,6 @@
/* sys/wait.h
Copyright 1997, 1998, 2001, 2002, 2003, 2004, 2006 Red Hat, Inc.
Copyright 1997, 1998, 2001, 2002, 2003, 2004, 2006, 2011 Red Hat, Inc.
This file is part of Cygwin.
@ -19,10 +19,25 @@ details. */
extern "C" {
#endif
pid_t wait (int *);
pid_t waitpid (pid_t, int *, int);
pid_t wait3 (int *__status, int __options, struct rusage *__rusage);
pid_t wait4 (pid_t __pid, int *__status, int __options, struct rusage *__rusage);
#ifdef __cplusplus
typedef int *__wait_status_ptr_t;
#else /* !__cplusplus */
/* Allow `int' and `union wait' for the status. */
typedef union
{
int *__int_ptr;
union wait *__union_wait_ptr;
} __wait_status_ptr_t __attribute__ ((__transparent_union__));
#endif /* __cplusplus */
pid_t wait (__wait_status_ptr_t __status);
pid_t waitpid (pid_t __pid, __wait_status_ptr_t __status, int __options);
pid_t wait3 (__wait_status_ptr_t __status, int __options, struct rusage *__rusage);
pid_t wait4 (pid_t __pid, __wait_status_ptr_t __status, int __options, struct rusage *__rusage);
union wait
{
@ -49,7 +64,34 @@ union wait
#define w_stopval __wait_stopped.__w_stopval
#ifdef __cplusplus
};
}
#endif
#endif
/* Used in cygwin/wait.h, redefine to accept `int' and `union wait'. */
#undef __wait_status_to_int
#ifdef __cplusplus
inline int __wait_status_to_int (int __status)
{ return __status; }
inline int __wait_status_to_int (const union wait & __status)
{ return __status.w_status; }
/* C++ wait() variants for `union wait'. */
inline pid_t wait (union wait *__status)
{ return wait ((int *) __status); }
inline pid_t waitpid (pid_t __pid, union wait *__status, int __options)
{ return waitpid(__pid, (int *) __status, __options); }
inline pid_t wait3 (union wait *__status, int __options, struct rusage *__rusage)
{ return wait3 ((int *) __status, __options, __rusage); }
inline pid_t wait4 (pid_t __pid, union wait *__status, int __options, struct rusage *__rusage)
{ return wait4 (__pid, (int *) __status, __options, __rusage); }
#else /* !__cplusplus */
#define __wait_status_to_int(__status) (__extension__ \
(((union { __typeof(__status) __in; int __out; }) { .__in = (__status) }).__out))
#endif /* __cplusplus */
#endif /* _SYS_WAIT_H */