X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=reentr.pl;h=b90c61dcfc4479523ba1bdab0c3472788e9d746d;hb=38711ea60412cb0e0032aad346aee5f655f6a7ba;hp=fd19d51cf7c8ebe9f26055f0b5511cdce66d8220;hpb=a02a5408b2f199007c4dcb74559cc79066307ada;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/reentr.pl b/reentr.pl
index fd19d51..b90c61d 100644
--- a/reentr.pl
+++ b/reentr.pl
@@ -1,9 +1,20 @@
 #!/usr/bin/perl -w
-
-#
-# Generate the reentr.c and reentr.h,
-# and optionally also the relevant metaconfig units (-U option).
 # 
+# Regenerate (overwriting only if changed):
+#
+#    reentr.h
+#    reentr.c
+#
+# from information stored in the DATA section of this file.
+#
+# With the -U option, it also unconditionally regenerates the relevant
+# metaconfig units:
+#
+#    d_${func}_r.U
+#
+# Also accepts the standard regen_lib -q and -v args.
+#
+# This script is normally invoked from regen.pl.
 
 BEGIN {
     # Get function prototypes
@@ -13,7 +24,7 @@ BEGIN {
 use strict;
 use Getopt::Std;
 my %opts;
-getopts('U', \%opts);
+getopts('Uv', \%opts);
 
 my %map = (
 	   V => "void",
@@ -40,16 +51,15 @@ my %map = (
 # Example #3: S_CBI   means type func_r(const char*, char*, int)
 
 
-safer_unlink 'reentr.h';
-die "reentr.h: $!" unless open(H, ">reentr.h");
-binmode H;
-select H;
+# safer_unlink 'reentr.h';
+my $h = safer_open("reentr.h-new");
+select $h;
 print <<EOF;
 /* -*- buffer-read-only: t -*-
  *
  *    reentr.h
  *
- *    Copyright (C) 2002, 2003, 2005 by Larry Wall and others
+ *    Copyright (C) 2002, 2003, 2005, 2006, 2007 by Larry Wall and others
  *
  *    You may distribute under the terms of either the GNU General Public
  *    License or the Artistic License, as specified in the README file.
@@ -61,13 +71,29 @@ print <<EOF;
 #ifndef REENTR_H
 #define REENTR_H
 
+/* If compiling for a threaded perl, we will macro-wrap the system/library
+ * interfaces (e.g. getpwent()) which have threaded versions
+ * (e.g. getpwent_r()), which will handle things correctly for
+ * the Perl interpreter, but otherwise (for XS) the wrapping does
+ * not take place.  See L<perlxs/Thread-aware system interfaces>.
+ */
+
+#ifndef PERL_REENTR_API
+# if defined(PERL_CORE) || defined(PERL_EXT)
+#  define PERL_REENTR_API 1
+# else
+#  define PERL_REENTR_API 0
+# endif
+#endif
+
 #ifdef USE_REENTRANT_API
  
 /* Deprecations: some platforms have the said reentrant interfaces
  * but they are declared obsolete and are not to be used.  Often this
  * means that the platform has threadsafed the interfaces (hopefully).
  * All this is OS version dependent, so we are of course fooling ourselves.
- * If you know of more deprecations on some platforms, please add your own. */
+ * If you know of more deprecations on some platforms, please add your own
+ * (by editing reentr.pl, mind!) */
 
 #ifdef __hpux
 #   undef HAS_CRYPT_R
@@ -94,9 +120,9 @@ print <<EOF;
  * memzero out certain structures before calling the functions.
  */
 #if defined(__OpenBSD__)
-#    define REENTR_MEMZERO(a,b) memzero(a,b),
+#    define REENTR_MEMZERO(a,b) memzero(a,b)
 #else
-#    define REENTR_MEMZERO(a,b)
+#    define REENTR_MEMZERO(a,b) 0
 #endif 
 
 #ifdef NETDB_R_OBSOLETE
@@ -316,7 +342,7 @@ close DATA;
 
 # Prepare to continue writing the reentr.h.
 
-select H;
+select $h;
 
 {
     # Write out all the known prototype signatures.
@@ -489,7 +515,7 @@ EOF
 EOF
 	    pushssif $endif;
 	}
-        elsif ($func =~ /^(drand48|gmtime|localtime|random|srandom)$/) {
+        elsif ($func =~ /^(drand48|random|srandom)$/) {
 	    pushssif $ifdef;
 	    push @struct, <<EOF;
 	$seent{$func} _${func}_struct;
@@ -547,7 +573,7 @@ EOF
 	    push @size, <<EOF;
 #   if defined(HAS_SYSCONF) && defined($sc) && !defined(__GLIBC__)
 	PL_reentrant_buffer->$sz = sysconf($sc);
-	if (PL_reentrant_buffer->$sz == -1)
+	if (PL_reentrant_buffer->$sz == (size_t) -1)
 		PL_reentrant_buffer->$sz = REENTRANTUSUALSIZE;
 #   else
 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
@@ -634,6 +660,7 @@ EOF
 	push @wrap, $ifdef;
 
 	push @wrap, <<EOF;
+#  if defined(PERL_REENTR_API) && (PERL_REENTR_API+0 == 1)
 #   undef $func
 EOF
 
@@ -698,13 +725,14 @@ EOF
 			 } split '', $b;
 		$w = ", $w" if length $v;
 	    }
+
 	    my $call = "${func}_r($v$w)";
 
             # Must make OpenBSD happy
             my $memzero = '';
             if($p =~ /D$/ &&
                 ($genfunc eq 'protoent' || $genfunc eq 'servent')) {
-                $memzero = 'REENTR_MEMZERO(&PL_reentrant_buffer->_' . $genfunc . '_data, sizeof(PL_reentrant_buffer->_' . $genfunc . '_data))';
+                $memzero = 'REENTR_MEMZERO(&PL_reentrant_buffer->_' . $genfunc . '_data, sizeof(PL_reentrant_buffer->_' . $genfunc . '_data)),';
             }
 	    push @wrap, <<EOF;
 #   if !defined($func) && ${FUNC}_R_PROTO == REENTRANT_PROTO_$p
@@ -731,11 +759,15 @@ EOF
 EOF
 		}
 	    }
-	    push @wrap, <<EOF;
+	    push @wrap, <<EOF;  # !defined(xxx) && XXX_R_PROTO == REENTRANT_PROTO_Y_TS
 #   endif
 EOF
 	}
 
+	    push @wrap, <<EOF;  # defined(PERL_REENTR_API) && (PERL_REENTR_API+0 == 1)
+#  endif
+EOF
+
 	push @wrap, $endif, "\n";
     }
 }
@@ -763,20 +795,20 @@ typedef struct {
 /* ex: set ro: */
 EOF
 
-close(H);
+safer_close($h);
+rename_if_different('reentr.h-new', 'reentr.h');
 
 # Prepare to write the reentr.c.
 
-safer_unlink 'reentr.c';
-die "reentr.c: $!" unless open(C, ">reentr.c");
-binmode C;
-select C;
+# safer_unlink 'reentr.c';
+my $c = safer_open("reentr.c-new");
+select $c;
 print <<EOF;
 /* -*- buffer-read-only: t -*-
  *
  *    reentr.c
  *
- *    Copyright (C) 2002, 2003, 2005 by Larry Wall and others
+ *    Copyright (C) 2002, 2003, 2005, 2006, 2007 by Larry Wall and others
  *
  *    You may distribute under the terms of either the GNU General Public
  *    License or the Artistic License, as specified in the README file.
@@ -831,6 +863,14 @@ Perl_reentrant_retry(const char *f, ...)
 {
     dTHX;
     void *retptr = NULL;
+    va_list ap;
+#ifdef USE_REENTRANT_API
+    /* Easier to special case this here than in embed.pl. (Look at what it
+       generates for proto.h) */
+    PERL_ARGS_ASSERT_REENTRANT_RETRY;
+#endif
+    va_start(ap, f);
+    {
 #ifdef USE_REENTRANT_API
 #  if defined(USE_HOSTENT_BUFFER) || defined(USE_GRENT_BUFFER) || defined(USE_NETENT_BUFFER) || defined(USE_PWENT_BUFFER) || defined(USE_PROTOENT_BUFFER) || defined(USE_SERVENT_BUFFER)
     void *p0;
@@ -844,9 +884,6 @@ Perl_reentrant_retry(const char *f, ...)
 #  if defined(USE_HOSTENT_BUFFER) || defined(USE_NETENT_BUFFER) || defined(USE_PROTOENT_BUFFER) || defined(USE_SERVENT_BUFFER)
     int anint;
 #  endif
-    va_list ap;
-
-    va_start(ap, f);
 
     switch (PL_op->op_type) {
 #ifdef USE_HOSTENT_BUFFER
@@ -1049,15 +1086,20 @@ Perl_reentrant_retry(const char *f, ...)
 	/* Not known how to retry, so just fail. */
 	break;
     }
-
-    va_end(ap);
+#else
+    PERL_UNUSED_ARG(f);
 #endif
+    }
+    va_end(ap);
     return retptr;
 }
 
 /* ex: set ro: */
 EOF
 
+safer_close($c);
+rename_if_different('reentr.c-new', 'reentr.c');
+
 __DATA__
 asctime S	|time	|const struct tm|B_SB|B_SBI|I_SB|I_SBI
 crypt CC	|crypt	|struct crypt_data|B_CCS|B_CCD|D=CRYPTD*
@@ -1090,8 +1132,6 @@ getservbyname CC|netdb	|struct servent	|I_CCSBWR|S_CCSBI|I_CCSD|D=struct servent
 getservbyport IC|netdb	|struct servent	|I_ICSBWR|S_ICSBI|I_ICSD|D=struct servent_data*
 getservent	|netdb	|struct servent	|I_SBWR|I_SBI|S_SBI|I_SD|D=struct servent_data*
 getspnam C	|shadow	|struct spwd	|I_CSBWR|S_CSBI
-gmtime T	|time	|struct tm	|S_TS|I_TS|T=const time_t*
-localtime T	|time	|struct tm	|S_TS|I_TS|T=const time_t*
 random		|stdlib	|struct random_data|I_iS|I_lS|I_St|i=int*|l=long*|t=int32_t*
 readdir T	|dirent	|struct dirent	|I_TSR|I_TS|T=DIR*
 readdir64 T	|dirent	|struct dirent64|I_TSR|I_TS|T=DIR*