* 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.

winsup/cygwin/ChangeLog

@@ -1,3 +1,26 @@
+2005-01-25  Corinna Vinschen  <corinna@vinschen.de>
+
+	* 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.
+
 2005-01-25  Corinna Vinschen  <corinna@vinschen.de>
 
 	* path.cc (realpath): Allow to expand with .exe suffix.

winsup/cygwin/cygwin.din

@@ -653,6 +653,7 @@ getpid NOSIGFE
 _getpid = getpid NOSIGFE
 getppid NOSIGFE
 _getppid = getppid NOSIGFE
+getpriority NOSIGFE
 getpwduid NOSIGFE
 _getpwduid = getpwduid NOSIGFE
 getpwent SIGFE
@@ -1198,6 +1199,7 @@ setpgid SIGFE
 _setpgid = setpgid SIGFE
 setpgrp SIGFE
 _setpgrp = setpgrp SIGFE
+setpriority NOSIGFE
 setpwent NOSIGFE
 _setpwent = setpwent NOSIGFE
 setregid SIGFE

winsup/cygwin/fork.cc

@@ -383,6 +383,7 @@ fork_parent (HANDLE& hParent, dll *&first_dll,
   int child_pid = cygwin_pid (pi.dwProcessId);
   pinfo child (child_pid, 1);
   child->start_time = time (NULL); /* Register child's starting time. */
+  child->nice = myself->nice;
 
   if (!child)
     {

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 */

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

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___ */

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

winsup/cygwin/miscfuncs.cc

@@ -356,3 +356,87 @@ low_priority_sleep (DWORD secs)
 
   return curr_prio;
 }
+
+/* Get a default value for the nice factor.  When changing these values,
+   have a look into the below function nice_to_winprio.  The values must
+   match the layout of the static "priority" array. */
+int
+winprio_to_nice (DWORD prio)
+{
+  switch (prio)
+    {
+      case REALTIME_PRIORITY_CLASS:
+	return -20;
+      case HIGH_PRIORITY_CLASS:
+	return -16;
+      case ABOVE_NORMAL_PRIORITY_CLASS:
+	return -8;
+      case NORMAL_PRIORITY_CLASS:
+	return 0;
+      case BELOW_NORMAL_PRIORITY_CLASS:
+	return 8;
+      case IDLE_PRIORITY_CLASS:
+	return 16;
+    }
+  return 0;
+}
+
+/* Get a Win32 priority matching the incoming nice factor.  The incoming
+   nice is limited to the interval [-NZERO,NZERO-1]. */
+DWORD 
+nice_to_winprio (int &nice)
+{
+  static const DWORD priority[] NO_COPY =
+    {
+      REALTIME_PRIORITY_CLASS,		/*  0 */
+      HIGH_PRIORITY_CLASS,		/*  1 */
+      HIGH_PRIORITY_CLASS,
+      HIGH_PRIORITY_CLASS,
+      HIGH_PRIORITY_CLASS,
+      HIGH_PRIORITY_CLASS,
+      HIGH_PRIORITY_CLASS,
+      HIGH_PRIORITY_CLASS,		/*  7 */
+      ABOVE_NORMAL_PRIORITY_CLASS,	/*  8 */
+      ABOVE_NORMAL_PRIORITY_CLASS,
+      ABOVE_NORMAL_PRIORITY_CLASS,
+      ABOVE_NORMAL_PRIORITY_CLASS,
+      ABOVE_NORMAL_PRIORITY_CLASS,
+      ABOVE_NORMAL_PRIORITY_CLASS,
+      ABOVE_NORMAL_PRIORITY_CLASS,
+      ABOVE_NORMAL_PRIORITY_CLASS,	/* 15 */
+      NORMAL_PRIORITY_CLASS,		/* 16 */
+      NORMAL_PRIORITY_CLASS,
+      NORMAL_PRIORITY_CLASS,
+      NORMAL_PRIORITY_CLASS,
+      NORMAL_PRIORITY_CLASS,
+      NORMAL_PRIORITY_CLASS,
+      NORMAL_PRIORITY_CLASS,
+      NORMAL_PRIORITY_CLASS,		/* 23 */
+      BELOW_NORMAL_PRIORITY_CLASS,	/* 24 */
+      BELOW_NORMAL_PRIORITY_CLASS,
+      BELOW_NORMAL_PRIORITY_CLASS,
+      BELOW_NORMAL_PRIORITY_CLASS,
+      BELOW_NORMAL_PRIORITY_CLASS,
+      BELOW_NORMAL_PRIORITY_CLASS,
+      BELOW_NORMAL_PRIORITY_CLASS,
+      BELOW_NORMAL_PRIORITY_CLASS,	/* 31 */
+      IDLE_PRIORITY_CLASS,		/* 32 */
+      IDLE_PRIORITY_CLASS,
+      IDLE_PRIORITY_CLASS,
+      IDLE_PRIORITY_CLASS,
+      IDLE_PRIORITY_CLASS,
+      IDLE_PRIORITY_CLASS,
+      IDLE_PRIORITY_CLASS,
+      IDLE_PRIORITY_CLASS		/* 39 */
+    };
+  if (nice < -NZERO)
+    nice = -NZERO;
+  else if (nice > NZERO - 1)
+    nice = NZERO - 1;
+  DWORD prio = priority[nice + NZERO];
+  if (!wincap.has_extended_priority_class ()
+      && (prio == BELOW_NORMAL_PRIORITY_CLASS
+	  || prio == ABOVE_NORMAL_PRIORITY_CLASS))
+    prio = NORMAL_PRIORITY_CLASS;
+  return prio;
+}

winsup/cygwin/pinfo.cc

@@ -98,6 +98,8 @@ pinfo_init (char **envp, int envc)
       myself->uid = ILLEGAL_UID;
       myself->gid = UNKNOWN_GID;
       environ_init (NULL, 0);	/* call after myself has been set up */
+      myself->nice = winprio_to_nice (GetPriorityClass (hMainProc));
+      debug_printf ("Set nice to %d", myself->nice);
     }
 
   debug_printf ("pid %d, pgid %d", myself->pid, myself->pgid);

winsup/cygwin/pinfo.h

@@ -75,6 +75,7 @@ public:
   long start_time;
   struct rusage rusage_self;
   struct rusage rusage_children;
+  int nice;
 
   /* Non-zero if process was stopped by a signal. */
   char stopsig;

winsup/cygwin/spawn.cc

@@ -845,6 +845,7 @@ spawn_guts (const char * prog_arg, const char *const *argv,
       (void) DuplicateHandle (hMainProc, child.shared_handle (), pi.hProcess,
 			      NULL, 0, 0, DUPLICATE_SAME_ACCESS);
       child->start_time = time (NULL); /* Register child's starting time. */
+      child->nice = myself->nice;
       if (!child.remember (mode == _P_DETACH))
 	{
 	  /* FIXME: Child in strange state now */

winsup/cygwin/syscalls.cc

@@ -2443,48 +2443,43 @@ memccpy (_PTR out, const _PTR in, int c, size_t len)
 }
 
 extern "C" int
-nice (int incr)
+setpriority (int which, id_t who, int value)
 {
-  DWORD priority[] =
+  /* TODO: Support PRIO_PGRP and PRIO_USER. */
+  if (which != PRIO_PROCESS || (who != 0 && (pid_t) who != myself->pid))
     {
-      IDLE_PRIORITY_CLASS,
+      set_errno (EINVAL);
-      IDLE_PRIORITY_CLASS,
+      return -1;
-      NORMAL_PRIORITY_CLASS,
-      HIGH_PRIORITY_CLASS,
-      REALTIME_PRIORITY_CLASS,
-      REALTIME_PRIORITY_CLASS
-    };
-  int curr = 2;
-
-  switch (GetPriorityClass (hMainProc))
-    {
-      case IDLE_PRIORITY_CLASS:
-	curr = 1;
-	break;
-      case NORMAL_PRIORITY_CLASS:
-	curr = 2;
-	break;
-      case HIGH_PRIORITY_CLASS:
-	curr = 3;
-	break;
-      case REALTIME_PRIORITY_CLASS:
-	curr = 4;
-	break;
     }
-  if (incr > 0)
+  DWORD prio = nice_to_winprio (value);
-    incr = -1;
+  if (SetPriorityClass (hMainProc, prio) == FALSE)
-  else if (incr < 0)
-    incr = 1;
-
-  if (SetPriorityClass (hMainProc, priority[curr + incr]) == FALSE)
     {
       __seterrno ();
       return -1;
     }
-
+  myself->nice = value;
+  debug_printf ("Set nice to %d", myself->nice);
   return 0;
 }
 
+extern "C" int
+getpriority (int which, id_t who)
+{
+  /* TODO: Support PRIO_PGRP and PRIO_USER. */
+  if (which != PRIO_PROCESS || (who != 0 && (pid_t) who != myself->pid))
+    {
+      set_errno (EINVAL);
+      return -1;
+    }
+  return myself->nice;
+}
+
+extern "C" int
+nice (int incr)
+{
+  return setpriority (PRIO_PROCESS, myself->pid, myself->nice + incr);
+}
+
 /*
  * Find the first bit set in I.
  */
@@ -2588,7 +2583,7 @@ endutent ()
 }
 
 extern "C" void
-utmpname (_CONST char *file)
+utmpname (const char *file)
 {
   if (check_null_empty_str (file))
     {

winsup/cygwin/wincap.cc

@@ -54,7 +54,8 @@ static NO_COPY wincaps wincap_unknown = {
   has_switch_to_thread:false,
   cant_debug_dll_entry:false,
   has_ioctl_storage_get_media_types_ex:false,
-  start_proc_suspended:true
+  start_proc_suspended:true,
+  has_extended_priority_class:false
 };
 
 static NO_COPY wincaps wincap_95 = {
@@ -100,7 +101,8 @@ static NO_COPY wincaps wincap_95 = {
   has_switch_to_thread:false,
   cant_debug_dll_entry:true,
   has_ioctl_storage_get_media_types_ex:false,
-  start_proc_suspended:true
+  start_proc_suspended:true,
+  has_extended_priority_class:false
 };
 
 static NO_COPY wincaps wincap_95osr2 = {
@@ -146,7 +148,8 @@ static NO_COPY wincaps wincap_95osr2 = {
   has_switch_to_thread:false,
   cant_debug_dll_entry:true,
   has_ioctl_storage_get_media_types_ex:false,
-  start_proc_suspended:true
+  start_proc_suspended:true,
+  has_extended_priority_class:false
 };
 
 static NO_COPY wincaps wincap_98 = {
@@ -192,7 +195,8 @@ static NO_COPY wincaps wincap_98 = {
   has_switch_to_thread:false,
   cant_debug_dll_entry:true,
   has_ioctl_storage_get_media_types_ex:false,
-  start_proc_suspended:true
+  start_proc_suspended:true,
+  has_extended_priority_class:false
 };
 
 static NO_COPY wincaps wincap_98se = {
@@ -238,7 +242,8 @@ static NO_COPY wincaps wincap_98se = {
   has_switch_to_thread:false,
   cant_debug_dll_entry:true,
   has_ioctl_storage_get_media_types_ex:false,
-  start_proc_suspended:true
+  start_proc_suspended:true,
+  has_extended_priority_class:false
 };
 
 static NO_COPY wincaps wincap_me = {
@@ -284,7 +289,8 @@ static NO_COPY wincaps wincap_me = {
   has_switch_to_thread:false,
   cant_debug_dll_entry:true,
   has_ioctl_storage_get_media_types_ex:false,
-  start_proc_suspended:true
+  start_proc_suspended:true,
+  has_extended_priority_class:false
 };
 
 static NO_COPY wincaps wincap_nt3 = {
@@ -330,7 +336,8 @@ static NO_COPY wincaps wincap_nt3 = {
   has_switch_to_thread:false,
   cant_debug_dll_entry:false,
   has_ioctl_storage_get_media_types_ex:false,
-  start_proc_suspended:false
+  start_proc_suspended:false,
+  has_extended_priority_class:false
 };
 
 static NO_COPY wincaps wincap_nt4 = {
@@ -376,7 +383,8 @@ static NO_COPY wincaps wincap_nt4 = {
   has_switch_to_thread:true,
   cant_debug_dll_entry:false,
   has_ioctl_storage_get_media_types_ex:false,
-  start_proc_suspended:false
+  start_proc_suspended:false,
+  has_extended_priority_class:false
 };
 
 static NO_COPY wincaps wincap_nt4sp4 = {
@@ -422,7 +430,8 @@ static NO_COPY wincaps wincap_nt4sp4 = {
   has_switch_to_thread:true,
   cant_debug_dll_entry:false,
   has_ioctl_storage_get_media_types_ex:false,
-  start_proc_suspended:false
+  start_proc_suspended:false,
+  has_extended_priority_class:false
 };
 
 static NO_COPY wincaps wincap_2000 = {
@@ -468,7 +477,8 @@ static NO_COPY wincaps wincap_2000 = {
   has_switch_to_thread:true,
   cant_debug_dll_entry:false,
   has_ioctl_storage_get_media_types_ex:false,
-  start_proc_suspended:false
+  start_proc_suspended:false,
+  has_extended_priority_class:true
 };
 
 static NO_COPY wincaps wincap_xp = {
@@ -514,7 +524,8 @@ static NO_COPY wincaps wincap_xp = {
   has_switch_to_thread:true,
   cant_debug_dll_entry:false,
   has_ioctl_storage_get_media_types_ex:true,
-  start_proc_suspended:false
+  start_proc_suspended:false,
+  has_extended_priority_class:true
 };
 
 static NO_COPY wincaps wincap_2003 = {
@@ -560,7 +571,8 @@ static NO_COPY wincaps wincap_2003 = {
   has_switch_to_thread:true,
   cant_debug_dll_entry:false,
   has_ioctl_storage_get_media_types_ex:true,
-  start_proc_suspended:false
+  start_proc_suspended:false,
+  has_extended_priority_class:true
 };
 
 wincapc wincap;

winsup/cygwin/wincap.h

@@ -56,6 +56,7 @@ struct wincaps
   unsigned cant_debug_dll_entry				: 1;
   unsigned has_ioctl_storage_get_media_types_ex		: 1;
   unsigned start_proc_suspended				: 1;
+  unsigned has_extended_priority_class			: 1;
 };
 
 class wincapc
@@ -116,6 +117,7 @@ public:
   bool	IMPLEMENT (cant_debug_dll_entry)
   bool	IMPLEMENT (has_ioctl_storage_get_media_types_ex)
   bool	IMPLEMENT (start_proc_suspended)
+  bool	IMPLEMENT (has_extended_priority_class)
 
 #undef IMPLEMENT
 };

winsup/cygwin/winsup.h

@@ -306,6 +306,9 @@ extern "C" int low_priority_sleep (DWORD) __attribute__ ((regparm (1)));
 
 size_t getshmlba (void);
 
+int winprio_to_nice (DWORD) __attribute__ ((regparm (1)));
+DWORD nice_to_winprio (int &) __attribute__ ((regparm (1)));
+
 /**************************** Exports ******************************/
 
 extern "C" {