diff options
Diffstat (limited to 'posix/sys/wait.h')
| -rw-r--r-- | posix/sys/wait.h | 60 |
1 files changed, 27 insertions, 33 deletions
diff --git a/posix/sys/wait.h b/posix/sys/wait.h index f573d778f7..9b5025ab83 100644 --- a/posix/sys/wait.h +++ b/posix/sys/wait.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1991, 92, 93, 94, 96 Free Software Foundation, Inc. +/* Copyright (C) 1991, 92, 93, 94, 96, 97 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -38,43 +38,37 @@ __BEGIN_DECLS /* Lots of hair to allow traditional BSD use of `union wait' as well as POSIX.1 use of `int' for the status word. */ -#ifdef __GNUC__ -#define __WAIT_INT(status) \ +# ifdef __GNUC__ +# define __WAIT_INT(status) \ (__extension__ ({ union { __typeof(status) __in; int __i; } __u; \ __u.__in = (status); __u.__i; })) -#else -#define __WAIT_INT(status) (*(int *) &(status)) -#endif - -/* This is the type of the argument to `wait'. - - NOTE: Since this functionality is volatile, I'm disabling the use of it for - now. - -With GCC 2.6.1 and later, the funky union causes redeclarations with either - `int *' or `union wait *' to be allowed without complaint. - __WAIT_STATUS_DEFN is the type used in the actual function - definitions. */ - -#if (!defined (__GNUC__) || __GNUC__ < 2 || \ - /*(__GNUC__ == 2 && __GNUC_MINOR__ < 6)*/ 1) -#define __WAIT_STATUS __ptr_t -#define __WAIT_STATUS_DEFN __ptr_t -#else +# else +# define __WAIT_INT(status) (*(int *) &(status)) +# endif + +/* This is the type of the argument to `wait'. The funky union + causes redeclarations with ether `int *' or `union wait *' to be + allowed without complaint. __WAIT_STATUS_DEFN is the type used in + the actual function definitions. */ + +# if !defined __GNUC__ || __GNUC__ < 2 +# define __WAIT_STATUS __ptr_t +# define __WAIT_STATUS_DEFN __ptr_t +# else /* This works in GCC 2.6.1 and later. */ typedef union { union wait *__uptr; int *__iptr; } __WAIT_STATUS __attribute__ ((transparent_union)); -#define __WAIT_STATUS_DEFN int * +# define __WAIT_STATUS_DEFN int * #endif #else /* Don't use BSD. */ -#define __WAIT_INT(status) (status) -#define __WAIT_STATUS int * -#define __WAIT_STATUS_DEFN int * +# define __WAIT_INT(status) (status) +# define __WAIT_STATUS int * +# define __WAIT_STATUS_DEFN int * #endif /* Use BSD. */ @@ -89,10 +83,10 @@ typedef union #define WIFSTOPPED(status) __WIFSTOPPED(__WAIT_INT(status)) #ifdef __USE_BSD -#define WCOREFLAG __WCOREFLAG -#define WCOREDUMP(status) __WCOREDUMP(__WAIT_INT(status)) -#define W_EXITCODE(ret, sig) __W_EXITCODE(ret, sig) -#define W_STOPCODE(sig) __W_STOPCODE(sig) +# define WCOREFLAG __WCOREFLAG +# define WCOREDUMP(status) __WCOREDUMP(__WAIT_INT(status)) +# define W_EXITCODE(ret, sig) __W_EXITCODE(ret, sig) +# define W_STOPCODE(sig) __W_STOPCODE(sig) #endif @@ -103,8 +97,8 @@ extern __pid_t wait __P ((__WAIT_STATUS __stat_loc)); #ifdef __USE_BSD /* Special values for the PID argument to `waitpid' and `wait4'. */ -#define WAIT_ANY (-1) /* Any process. */ -#define WAIT_MYPGRP 0 /* Any process in my process group. */ +# define WAIT_ANY (-1) /* Any process. */ +# define WAIT_MYPGRP 0 /* Any process in my process group. */ #endif /* Wait for a child matching PID to die. @@ -124,7 +118,7 @@ extern __pid_t __waitpid __P ((__pid_t __pid, int *__stat_loc, extern __pid_t waitpid __P ((__pid_t __pid, int *__stat_loc, int __options)); -#if defined(__USE_BSD) || defined(__USE_XOPEN_EXTENDED) +#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED /* This being here makes the prototypes valid whether or not we have already included <sys/resource.h> to define `struct rusage'. */ struct rusage; |