CVS - usleep argument is the wrong type

Joel Sherrill
Fri Jan 9 23:17:00 GMT 2004

The prototype currently is:

sys/unistd.h:unsigned _EXFUN(usleep, (unsigned int __useconds));

According to the opengroup website, it should be

#include <unistd.h>
int usleep(useconds_t useconds);

Where useconds_t is defined in unistd.h and meets this rule:

     Used for time in microseconds. The type useconds_t is an unsigned 
integral capable of storing values at least in the range zero to 1,000,000.

sys/types.h defines useconds_t as a signed long type for both RTEMS
and Cygwin.  I propose the following patch:

2004-01-09  Joel Sherrill <>

	* libc/include/sys/types.h: Change useconds_t to unsigned long.
	* libc/sys/unistd.h: Change argument on usleep to useconds_t.

Index: sys/types.h
RCS file: /cvs/src/src/newlib/libc/include/sys/types.h,v
retrieving revision 1.19
diff -u -r1.19 types.h
--- sys/types.h 2 Jul 2003 20:32:07 -0000       1.19
+++ sys/types.h 9 Jan 2004 23:16:33 -0000
@@ -254,7 +254,7 @@

  #if defined(__CYGWIN__) || defined(__rtems__)
-typedef long useconds_t;
+typedef unsigned long useconds_t;

  #include <sys/features.h>
Index: sys/unistd.h
RCS file: /cvs/src/src/newlib/libc/include/sys/unistd.h,v
retrieving revision 1.47
diff -u -r1.47 unistd.h
--- sys/unistd.h        26 Nov 2003 19:15:17 -0000      1.47
+++ sys/unistd.h        9 Jan 2004 23:16:33 -0000
@@ -53,6 +53,7 @@
  pid_t   _EXFUN(fork, (void ));
  long    _EXFUN(fpathconf, (int __fd, int __name ));
  int     _EXFUN(fsync, (int __fd));
+int     _EXFUN(fdatasync, (int __fd));
  char    _EXFUN(*getcwd, (char *__buf, size_t __size ));
  #if defined(__CYGWIN__)
  int    _EXFUN(getdomainname ,(char *__name, size_t __len));
@@ -193,7 +194,7 @@
  int    _EXFUN(getdtablesize, (void));
  int    _EXFUN(setdtablesize, (int));
  useconds_t _EXFUN(ualarm, (useconds_t __useconds, useconds_t __interval));
-unsigned _EXFUN(usleep, (unsigned int __useconds));
+unsigned _EXFUN(usleep, (useconds_t __useconds));
  #if !(defined  (_WINSOCK_H) || defined (__USE_W32_SOCKETS))
  /* winsock[2].h defines as __stdcall, and with int as 2nd arg */
   int   _EXFUN(gethostname, (char *__name, size_t __len));

Joel Sherrill, Ph.D.             Director of Research & Development                 On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
Support Available                (256) 722-9985

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