* cygwin.din: Export getpriority and setpriority.

	* fork.cc (fork_parent): Copy parent's nice value into child.
	* spawn.cc (spawn_guts): Ditto.
	* miscfuncs.cc (winprio_to_nice): New function.
	(nice_to_winprio): Ditto.
	* pinfo.cc (pinfo_init): If parent is not a Cygwin process, set
	default nice value according to current Win32 priority class.
	* pinfo.h (class _pinfo): Add nice member.
	* syscalls.cc (setpriority): New function, only implementing
	PRIO_PROCESS for now.
	(getpriority): Ditto.
	(nice): Just call setpriority.
	* wincap.h (wincaps::has_extended_priority_class): New element.
	* wincap.cc: Implement above element throughout.
	* winsup.h: Add prototypes for winprio_to_nice and nice_to_winprio.
	* include/limits.h (NZERO): New define.
	* include/cygwin/types.h (id_t): New datatype.
	* include/cygwin/version.h: Bump API minor version.
	* include/sys/resource.h: Add PRIO_XXX defines and prototypes for
	getpriority and setpriority.

4 files changed, 19 insertions, 1 deletions

diff --git a/winsup/cygwin/include/cygwin/types.h b/winsup/cygwin/include/cygwin/types.h
index aaa0f67f1..3964ae3a9 100644
--- a/winsup/cygwin/include/cygwin/types.h
+++ b/winsup/cygwin/include/cygwin/types.h
@@ -99,6 +99,12 @@ typedef __ino32_t ino_t;
 #endif
 #endif /*__ino_t_defined*/
 
+/* Generic ID type, must match at least pid_t, uid_t and gid_t in size. */
+#ifndef __id_t_defined
+#define __id_t_defined
+typedef unsigned long id_t;
+#endif /* __id_t_defined */
+
 #if defined (__INSIDE_CYGWIN__)
 struct __flock32 {
 	short	 l_type;	/* F_RDLCK, F_WRLCK, or F_UNLCK */
diff --git a/winsup/cygwin/include/cygwin/version.h b/winsup/cygwin/include/cygwin/version.h
index f81bc2afc..c38fc5520 100644
--- a/winsup/cygwin/include/cygwin/version.h
+++ b/winsup/cygwin/include/cygwin/version.h
@@ -245,12 +245,13 @@ details. */
            getlogin_r.
       116: Export atoll.
       117: Export utmpx functions, Return utmp * from pututent.
+      118: Export getpriority, setpriority.
      */
 
      /* Note that we forgot to bump the api for ualarm, strtoll, strtoull */
 
 #define CYGWIN_VERSION_API_MAJOR 0
-#define CYGWIN_VERSION_API_MINOR 117
+#define CYGWIN_VERSION_API_MINOR 118
 
      /* There is also a compatibity version number associated with the
 	shared memory regions.  It is incremented when incompatible
diff --git a/winsup/cygwin/include/limits.h b/winsup/cygwin/include/limits.h
index 25136acdf..5ef3513ce 100644
--- a/winsup/cygwin/include/limits.h
+++ b/winsup/cygwin/include/limits.h
@@ -182,5 +182,8 @@ details. */
 
 #define RTSIG_MAX		_POSIX_RTSIG_MAX
 
+/* Used for nice and get/setpriority. */
+#define NZERO			20
+
 #endif /* _MACH_MACHLIMITS_H_ */
 #endif /* _LIMITS_H___ */
diff --git a/winsup/cygwin/include/sys/resource.h b/winsup/cygwin/include/sys/resource.h
index c1fe544a9..d2de569cd 100644
--- a/winsup/cygwin/include/sys/resource.h
+++ b/winsup/cygwin/include/sys/resource.h
@@ -17,6 +17,11 @@ details. */
 extern "C" {
 #endif
 
+/* Used for get/setpriority */
+#define PRIO_PROCESS	0
+#define PRIO_PGRP	1
+#define PRIO_USER	2
+
 #define RLIMIT_CPU	0		/* CPU time in seconds */
 #define RLIMIT_FSIZE	1		/* Maximum filesize */
 #define RLIMIT_DATA	2		/* max data size */
@@ -68,6 +73,9 @@ int setrlimit (int __resource, const struct rlimit *__rlp);
 
 int getrusage (int __who, struct rusage *__rusage);
 
+int getpriority (int which, id_t who);
+int setpriority (int which, id_t who, int value);
+
 #ifdef __cplusplus
 }
 #endif