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git://sourceware.org/git/newlib-cygwin.git
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f3b8138239
Add a _REENT_ERRNO() macro to encapsulate the access to the _errno member of struct reent. This will help to replace the structure member with a thread-local storage object in a follow up patch. Replace uses of __errno_r() with _REENT_ERRNO(). Keep __errno_r() macro for potential users outside of Newlib.
88 lines
1.6 KiB
C
88 lines
1.6 KiB
C
/* Reentrant versions of syscalls need to support signal/raise.
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These implementations just call the usual system calls. */
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#include <reent.h>
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#include <signal.h>
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#include <unistd.h>
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#include <_syslist.h>
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/* Some targets provides their own versions of these functions. Those
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targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS. */
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#ifdef _REENT_ONLY
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#ifndef REENTRANT_SYSCALLS_PROVIDED
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#define REENTRANT_SYSCALLS_PROVIDED
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#endif
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#endif
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#ifdef REENTRANT_SYSCALLS_PROVIDED
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int _dummy_link_syscalls = 1;
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#else
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/* We use the errno variable used by the system dependent layer. */
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#undef errno
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extern int errno;
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/*
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FUNCTION
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<<_kill_r>>---Reentrant version of kill
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INDEX
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_kill_r
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SYNOPSIS
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#include <reent.h>
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int _kill_r(struct _reent *<[ptr]>, int <[pid]>, int <[sig]>);
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DESCRIPTION
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This is a reentrant version of <<kill>>. It
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takes a pointer to the global data block, which holds
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<<errno>>.
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*/
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int
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_kill_r (struct _reent *ptr,
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int pid,
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int sig)
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{
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int ret;
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errno = 0;
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if ((ret = _kill (pid, sig)) == -1 && errno != 0)
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_REENT_ERRNO(ptr) = errno;
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return ret;
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}
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/*
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NEWPAGE
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FUNCTION
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<<_getpid_r>>---Reentrant version of getpid
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INDEX
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_getpid_r
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SYNOPSIS
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#include <reent.h>
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int _getpid_r(struct _reent *<[ptr]>);
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DESCRIPTION
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This is a reentrant version of <<getpid>>. It
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takes a pointer to the global data block, which holds
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<<errno>>.
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We never need <<errno>>, of course, but for consistency we
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still must have the reentrant pointer argument.
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*/
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int
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_getpid_r (struct _reent *ptr)
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{
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int ret;
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ret = _getpid ();
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return ret;
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}
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#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */
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