Clib string & memory functions

git-svn-id: svn://kolibrios.org@553 a494cfbc-eb01-0410-851d-a64ba20cac60
2007-06-26 00:54:22 +00:00
parent d5f66e011c
commit 836c97f0ac
162 changed files with 11855 additions and 0 deletions
--- a/watcom/trunk/clib/heap/heapgrow.c
+++ b/watcom/trunk/clib/heap/heapgrow.c
@@ -0,0 +1,126 @@
+/****************************************************************************
+*
+*                            Open Watcom Project
+*
+*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
+*
+*  ========================================================================
+*
+*    This file contains Original Code and/or Modifications of Original
+*    Code as defined in and that are subject to the Sybase Open Watcom
+*    Public License version 1.0 (the 'License'). You may not use this file
+*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
+*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
+*    provided with the Original Code and Modifications, and is also
+*    available at www.sybase.com/developer/opensource.
+*
+*    The Original Code and all software distributed under the License are
+*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
+*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
+*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
+*    NON-INFRINGEMENT. Please see the License for the specific language
+*    governing rights and limitations under the License.
+*
+*  ========================================================================
+*
+* Description:  Routines to grow heap (allocate memory from OS).
+*
+****************************************************************************/
+
+
+//#include "dll.h"        // needs to be first
+#include "variety.h"
+#include <stddef.h>
+#include <stdlib.h>
+#include <malloc.h>
+#if defined(__QNX__)
+#elif defined(__LINUX__)
+#elif defined(__OS2__)
+#elif defined(_M_IX86)
+//    #include "tinyio.h"
+#endif
+#include "heap.h"
+#include "heapacc.h"
+
+#if defined(M_I86)
+
+_WCRTLINK void _fheapgrow( void )
+{
+    /* multiple heaps are used so growing the far heaps is not necessary */
+}
+
+#endif
+
+
+#if defined(__SMALL_DATA__)
+
+_WCRTLINK void _heapgrow( void )
+    {
+        _nheapgrow();
+    }
+
+#else
+
+_WCRTLINK void _heapgrow( void )
+    {
+        _fheapgrow();
+    }
+
+#endif
+
+
+_WCRTLINK void _nheapgrow( void )
+    {
+#if defined(__WINDOWS_286__) || defined(__386__) || defined(__AXP__) || defined(__PPC__) || defined(__MIPS__)
+        _nfree( _nmalloc( 1 ) );        /* get something into the heap */
+#else
+        unsigned max_paras;
+        unsigned curr_paras;
+        unsigned diff_paras;
+        unsigned expand;
+
+        _AccessNHeap();
+        /* calculate # pages which always has extra slack space (ie. 0x10) */
+        curr_paras = (( _curbrk + 0x10 ) & ~0x0f ) >> 4;
+        if( curr_paras == 0 ) {
+            /* we're already at 64k */
+            _ReleaseNHeap();
+            return;
+        }
+#if defined(__QNX__)
+        if( qnx_segment_realloc( _DGroup(), 65536L ) == -1 ) {
+            _ReleaseNHeap();
+            return;
+        }
+        max_paras = PARAS_IN_64K;
+#elif defined(__OS2__)
+        if( DosReallocSeg( 0, _DGroup() ) )  {
+            _ReleaseNHeap();
+            return;
+        }
+        max_paras = PARAS_IN_64K;
+#else
+        if( _osmode != DOS_MODE ) {                     /* 23-apr-91 */
+            max_paras = PARAS_IN_64K;
+        } else {
+            max_paras = TinyMaxSet( _psp );
+            /* subtract off code size */
+            max_paras -= _DGroup() - _psp;
+            if( max_paras > PARAS_IN_64K ) {
+                max_paras = PARAS_IN_64K;
+            }
+        }
+#endif
+        if( max_paras <= curr_paras ) {
+            /* '<' -> something is wrong, '==' -> can't change size */
+            _ReleaseNHeap();
+            return;
+        }
+        diff_paras = max_paras - curr_paras;
+        expand = (( diff_paras + 1 ) << 4 ) - ( _curbrk & 0x0f );
+        expand += __LastFree(); /* compensate for _expand's adjustment */
+        _ReleaseNHeap();
+        _nfree( _nmalloc( expand - ( sizeof( size_t ) + sizeof(frl) ) ) );
+#endif
+    }