Submitted by: John Birrell <cimaxp1!jb@werple.net.au>

Here are the diffs for libc_r to get it one step closer to P1003.1c
These make most of the thread/mutex/condvar structures opaque to the
user. There are three functions which have been renamed with _np
suffixes because they are extensions to P1003.1c (I did them for JAVA,
which needs to suspend/resume threads and also start threads suspended).

I've created a new header (pthread_np.h) for the non-POSIX stuff.

The egrep tags stuff in /usr/src/lib/libc_r/Makefile that I uncommented
doesn't work. I think its best to delete it. I don't think libc_r needs
tags anyway, 'cause most of the source is in libc which does have tags.

also:

Here's the first batch of man pages for the thread functions.
The diff to /usr/src/lib/libc_r/Makefile removes some stuff that was
inherited from /usr/src/lib/libc/Makefile that should only be done with
libc.

also:

I should have sent this diff with the pthread(3) man page.
It allows people to type

make -DWANT_LIBC_R world

to get libc_r built with the rest of the world. I put this in the
pthread(3) man page.  The default is still not to build libc_r.


also:
The diff attached adds a pthread(3) man page to /usr/src/share/man/man3.
The idea is that without libc_r installed, this man page will give people
enough info to know that they have to build libc_r.

1 files changed, 27 insertions, 9 deletions

diff --git a/lib/libc/i386/SYS.h b/lib/libc/i386/SYS.h
index caea98ff9e23..c8a86f5ee2d5 100644
--- a/lib/libc/i386/SYS.h
+++ b/lib/libc/i386/SYS.h
@@ -35,7 +35,7 @@
  *
  *	from: @(#)SYS.h	5.5 (Berkeley) 5/7/91
  *
- *	$Id: SYS.h,v 1.3 1996/01/22 00:00:51 julian Exp $
+ *	$Id: SYS.h,v 1.4 1996/05/05 07:56:03 peter Exp $
  */
 
 #include <sys/syscall.h>
@@ -64,20 +64,38 @@
 #define	SYSCALL(x)	2: PIC_PROLOGUE; jmp PIC_PLT(HIDENAME(cerror)); ENTRY(x); lea __CONCAT(SYS_,x),%eax; KERNCALL; jb 2b
 #define	RSYSCALL(x)	SYSCALL(x); ret
 
+#define	PSEUDO(x,y)	ENTRY(x); lea __CONCAT(SYS_,y), %eax; KERNCALL; ret
+#define	CALL(x,y)	call CNAME(y); addl $4*x,%esp
+/* gas fucks up offset -- although we don't currently need it, do for BCS */
+#define	LCALL(x,y)	.byte 0x9a ; .long y; .word x
+
+/*
+ * Design note:
+ *
+ * The macros PSYSCALL() and PRSYSCALL() are intended for use where a
+ * syscall needs to be renamed in the threaded library. When building
+ * a normal library, they default to the traditional SYSCALL() and
+ * RSYSCALL(). This avoids the need to #ifdef _THREAD_SAFE everywhere
+ * that the renamed function needs to be called.
+ */
+#ifdef _THREAD_SAFE	/* in case */
 /*
  * For the thread_safe versions, we prepend _thread_sys_ to the function
  * name so that the 'C' wrapper can go around the real name.
  */
-#ifdef _THREAD_SAFE	/* in case */
-#define	PSYSCALL(x,y)	2: PIC_PROLOGUE; jmp PIC_PLT(HIDENAME(cerror)); ENTRY(y); lea __CONCAT(SYS_,x),%eax; KERNCALL; jb 2b
-#define	PRSYSCALL(x,y)	PSYSCALL(x,y); ret
+#define	PSYSCALL(x)	2: PIC_PROLOGUE; jmp PIC_PLT(HIDENAME(cerror)); ENTRY(_thread_sys_/**/x); lea __CONCAT(SYS_,x),%eax; KERNCALL; jb 2b
+#define	PRSYSCALL(x)	PSYSCALL(x); ret
+#define	PPSEUDO(x,y)	ENTRY(_thread_sys_/**/x); lea __CONCAT(SYS_,y), %eax; KERNCALL; ret
+#else
+/*
+ * The non-threaded library defaults to traditional syscalls where
+ * the function name matches the syscall name.
+ */
+#define	PSYSCALL(x)	SYSCALL(x)
+#define	PRSYSCALL(x)	RSYSCALL(x)
+#define	PPSEUDO(x,y)	PSEUDO(x,y)
 #endif
 
-#define	PSEUDO(x,y)	ENTRY(x); lea __CONCAT(SYS_,y), %eax; KERNCALL; ret
-#define	CALL(x,y)	call CNAME(y); addl $4*x,%esp
-/* gas fucks up offset -- although we don't currently need it, do for BCS */
-#define	LCALL(x,y)	.byte 0x9a ; .long y; .word x
-
 #ifdef __ELF__
 #define KERNCALL	int $0x80	/* Faster */
 #else