whatnspr.c
上传用户:lyxiangda
上传日期:2007-01-12
资源大小:3042k
文件大小:4k
- /*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is the Netscape security libraries.
- *
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1994-2000 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
- #ifdef DEBUG
- static const char CVS_ID[] = "@(#) $RCSfile: whatnspr.c,v $ $Revision: 1.1 $ $Date: 2000/05/17 20:19:24 $ $Name: NSS_3_1_1_RTM $";
- #endif /* DEBUG */
- #ifndef BASE_H
- #include "base.h"
- #endif /* BASE_H */
- /*
- * This file isolates us from differences in NSPR versions.
- * We have to detect the library with which we're running at
- * runtime, and switch behaviours there. This lets us do
- * stuff like load cryptoki modules in Communicator.
- *
- * Hey, it's the PORT layer all over again!
- */
- static int whatnspr = 0;
- static int
- set_whatnspr
- (
- void
- )
- {
- /*
- * The only runtime difference I could find was the
- * return value of PR_dtoa. We can't just look for
- * a symbol in NSPR >=2, because it'll always be
- * found (because we compile against NSPR >=2).
- * Maybe we could look for a symbol merely in NSPR 1?
- *
- */
- char buffer[64];
- int decpt = 0, sign = 0;
- char *rve = (char *)0;
- /* extern int PR_dtoa(double, int, int, int *, int *, char **, char *, int); */
- int r = (int)PR_dtoa((double)1.0, 0, 5, &decpt, &sign, &rve,
- buffer, sizeof(buffer));
- switch( r ) {
- case 0:
- case -1:
- whatnspr = 2;
- /*
- * If we needed to, *now* we could look up "libVersionPoint"
- * and get more data there.. except all current NSPR's (up
- * to NSPR 4.x at time of writing) still say 2 in their
- * version structure.
- */
- break;
- default:
- whatnspr = 1;
- break;
- }
- return whatnspr;
- }
- #define WHATNSPR (whatnspr ? whatnspr : set_whatnspr())
- NSS_IMPLEMENT PRStatus
- nss_NewThreadPrivateIndex
- (
- PRUintn *ip
- )
- {
- switch( WHATNSPR ) {
- case 1:
- {
- PRLibrary *l = (PRLibrary *)0;
- void *f = PR_FindSymbolAndLibrary("PR_NewThreadPrivateID", &l);
- typedef PRInt32 (*ntpt)(void);
- ntpt ntp = (ntpt) f;
- PR_ASSERT((void *)0 != f);
- *ip = ntp();
- return PR_SUCCESS;
- }
- case 2:
- default:
- return PR_NewThreadPrivateIndex(ip, NULL);
- }
- }
- NSS_IMPLEMENT void *
- nss_GetThreadPrivate
- (
- PRUintn i
- )
- {
- switch( WHATNSPR ) {
- case 1:
- {
- PRLibrary *l = (PRLibrary *)0;
- void *f = PR_FindSymbolAndLibrary("PR_GetThreadPrivate", &l);
- typedef void *(*gtpt)(PRThread *, PRInt32);
- gtpt gtp = (gtpt) f;
- PR_ASSERT((void *)0 != f);
- return gtp(PR_CurrentThread(), i);
- }
- case 2:
- default:
- return PR_GetThreadPrivate(i);
- }
- }
- NSS_IMPLEMENT void
- nss_SetThreadPrivate
- (
- PRUintn i,
- void *v
- )
- {
- switch( WHATNSPR ) {
- case 1:
- {
- PRLibrary *l = (PRLibrary *)0;
- void *f = PR_FindSymbolAndLibrary("PR_SetThreadPrivate", &l);
- typedef PRStatus (*stpt)(PRThread *, PRInt32, void *);
- stpt stp = (stpt) f;
- PR_ASSERT((void *)0 != f);
- (void)stp(PR_CurrentThread(), i, v);
- return;
- }
- case 2:
- default:
- (void)PR_SetThreadPrivate(i, v);
- return;
- }
- }