newlib/libc/reent/signalr.c

   1 /* Reentrant versions of syscalls need to support signal/raise.
   2    These implementations just call the usual system calls.  */
   3
   4 #include <reent.h>
   5 #include <signal.h>
   6 #include <unistd.h>
   7 #include <_syslist.h>
   8
   9 /* Some targets provides their own versions of these functions.  Those
  10    targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS.  */
  11
  12 #ifdef _REENT_ONLY
  13 #ifndef REENTRANT_SYSCALLS_PROVIDED
  14 #define REENTRANT_SYSCALLS_PROVIDED
  15 #endif
  16 #endif
  17
  18 #ifdef REENTRANT_SYSCALLS_PROVIDED
  19
  20 int _dummy_link_syscalls = 1;
  21
  22 #else
  23
  24 /* We use the errno variable used by the system dependent layer.  */
  25 #undef errno
  26 extern int errno;
  27
  28 /*
  29 FUNCTION
  30         <<_kill_r>>---Reentrant version of kill
  31
  32 INDEX
  33         _kill_r
  34
  35 SYNOPSIS
  36         #include <reent.h>
  37         int _kill_r(struct _reent *<[ptr]>, int <[pid]>, int <[sig]>);
  38
  39 DESCRIPTION
  40         This is a reentrant version of <<kill>>.  It
  41         takes a pointer to the global data block, which holds
  42         <<errno>>.
  43 */
  44
  45 int
  46 _kill_r (struct _reent *ptr,
  47      int pid,
  48      int sig)
  49 {
  50   int ret;
  51
  52   errno = 0;
  53   if ((ret = _kill (pid, sig)) == -1 && errno != 0)
  54     _REENT_ERRNO(ptr) = errno;
  55   return ret;
  56 }
  57
  58 /*
  59 NEWPAGE
  60 FUNCTION
  61         <<_getpid_r>>---Reentrant version of getpid
  62
  63 INDEX
  64         _getpid_r
  65
  66 SYNOPSIS
  67         #include <reent.h>
  68         int _getpid_r(struct _reent *<[ptr]>);
  69
  70 DESCRIPTION
  71         This is a reentrant version of <<getpid>>.  It
  72         takes a pointer to the global data block, which holds
  73         <<errno>>.
  74
  75         We never need <<errno>>, of course, but for consistency we
  76         still must have the reentrant pointer argument.
  77 */
  78
  79 int
  80 _getpid_r (struct _reent *ptr)
  81 {
  82   int ret;
  83   ret = _getpid ();
  84   return ret;
  85 }
  86
  87 #endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */