[MPlayer-cvslog] r26108 - in trunk/osdep: Makefile mmap-os2.c mmap.h
diego
subversion at mplayerhq.hu
Wed Feb 27 23:29:52 CET 2008
Author: diego
Date: Wed Feb 27 23:29:52 2008
New Revision: 26108
Log:
mmap() support for OS/2
patch by KO Myung-Hun, komh chollian net
Added:
trunk/osdep/mmap-os2.c
trunk/osdep/mmap.h
Modified:
trunk/osdep/Makefile
Modified: trunk/osdep/Makefile
==============================================================================
--- trunk/osdep/Makefile (original)
+++ trunk/osdep/Makefile Wed Feb 27 23:29:52 2008
@@ -26,6 +26,9 @@ getch = getch2-win.c
endif
ifeq ($(TARGET_OS),OS/2)
getch = getch2-os2.c
+ifneq ($(HAVE_SYS_MMAN_H),yes)
+SRCS_COMMON += mmap-os2.c
+endif
endif
SRCS_COMMON += $(timer)
SRCS_COMMON += $(getch)
Added: trunk/osdep/mmap-os2.c
==============================================================================
--- (empty file)
+++ trunk/osdep/mmap-os2.c Wed Feb 27 23:29:52 2008
@@ -0,0 +1,210 @@
+/*
+ * very simple implementation of mmap() for OS/2
+ *
+ * Copyright (c) 2008 KO Myung-Hun (komh at chollian.net)
+ *
+ * This file is part of MPlayer.
+ *
+ * MPlayer is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * MPlayer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with MPlayer; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#define INCL_DOS
+#include <os2.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <io.h>
+#include <sys/types.h>
+
+#include "config.h"
+#include "mmap.h"
+#include "mmap_anon.h"
+
+typedef struct os2_mmap_s
+{
+ void *addr;
+ size_t len;
+ int flags;
+ struct os2_mmap_s *prev;
+ struct os2_mmap_s *next;
+} os2_mmap;
+static os2_mmap *m_mmap = NULL;
+
+void *mmap( void *addr, size_t len, int prot, int flags, int fildes, off_t off )
+{
+ os2_mmap *new_mmap;
+
+ ULONG fl;
+ ULONG rc;
+
+ void *ret;
+
+ if( prot & PROT_WRITE )
+ {
+ if( flags & MAP_SHARED )
+ return MAP_FAILED;
+
+ if( !( flags & MAP_PRIVATE ))
+ return MAP_FAILED;
+ }
+
+ if( flags & MAP_FIXED )
+ {
+ ULONG cb;
+
+ cb = len;
+ rc = DosQueryMem( addr, &cb, &fl );
+ if( rc || ( cb < len ))
+ return MAP_FAILED;
+
+ rc = DosSetMem( addr, len, fPERM );
+ if( rc )
+ return MAP_FAILED;
+
+ ret = addr;
+ }
+ else
+ {
+ // Allocate tiled memory compatible with 16-bit selectors
+ // 'fs_seg' in 'ldt_keeper.c' need this attribute
+ rc = DosAllocMem( &ret, len, fALLOC );
+ if( rc )
+ return MAP_FAILED;
+ }
+
+ new_mmap = ( os2_mmap * )malloc( sizeof( os2_mmap ));
+ new_mmap->addr = ret;
+ new_mmap->len = len;
+ new_mmap->flags = flags;
+ new_mmap->prev = m_mmap;
+ new_mmap->next = NULL;
+
+ if( m_mmap )
+ m_mmap->next = new_mmap;
+ m_mmap = new_mmap;
+
+ if( !( flags & MAP_ANON ))
+ {
+ int pos;
+
+ /* Now read in the file */
+ if(( pos = lseek( fildes, off, SEEK_SET )) == -1)
+ {
+ munmap( ret, len );
+
+ return MAP_FAILED;
+ }
+
+ read( fildes, ret, len );
+ lseek( fildes, pos, SEEK_SET ); /* Restore the file pointer */
+ }
+
+ fl = 0;
+
+ if( prot & PROT_READ )
+ fl |= PAG_READ;
+
+ if( prot & PROT_WRITE )
+ fl |= PAG_WRITE;
+
+ if( prot & PROT_EXEC )
+ fl |= PAG_EXECUTE;
+
+ if( prot & PROT_NONE )
+ fl |= PAG_GUARD;
+
+ rc = DosSetMem( ret, len, fl );
+ if( rc )
+ {
+ munmap( ret, len );
+
+ return MAP_FAILED;
+ }
+
+ return ret;
+}
+
+int munmap( void *addr, size_t len )
+{
+ os2_mmap *mm;
+
+ for( mm = m_mmap; mm; mm = mm->prev )
+ {
+ if( mm->addr == addr )
+ break;
+ }
+
+ if( mm )
+ {
+
+ if( !( mm->flags & MAP_FIXED ))
+ DosFreeMem( addr );
+
+ if( mm->next )
+ mm->next->prev = mm->prev;
+
+ if( mm->prev )
+ mm->prev->next = mm->next;
+
+ if( m_mmap == mm )
+ m_mmap = mm->prev;
+
+ free( mm );
+
+ return 0;
+ }
+
+ return -1;
+}
+
+int mprotect( void *addr, size_t len, int prot )
+{
+ os2_mmap *mm;
+
+ for( mm = m_mmap; mm; mm = mm->prev )
+ {
+ if( mm->addr == addr )
+ break;
+ }
+
+ if( mm )
+ {
+ ULONG fl;
+
+ fl = 0;
+
+ if( prot & PROT_READ )
+ fl |= PAG_READ;
+
+ if( prot & PROT_WRITE )
+ fl |= PAG_WRITE;
+
+ if( prot & PROT_EXEC )
+ fl |= PAG_EXECUTE;
+
+ if( prot & PROT_NONE )
+ fl |= PAG_GUARD;
+
+ if( DosSetMem( addr, len, fl ) == 0 )
+ return 0;
+ }
+
+ return -1;
+}
+
+void *mmap_anon( void *addr, size_t len, int prot, int flags, off_t off )
+{
+ return mmap( addr, len, prot, flags | MAP_ANON, -1, off );
+}
Added: trunk/osdep/mmap.h
==============================================================================
--- (empty file)
+++ trunk/osdep/mmap.h Wed Feb 27 23:29:52 2008
@@ -0,0 +1,56 @@
+/*
+ * mmap declaration header for systems with missing/nonfunctional sys/mman.h
+ *
+ * Copyright (c) 2008 KO Myung-Hun (komh at chollian.net)
+ *
+ * This file is part of MPlayer.
+ *
+ * MPlayer is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * MPlayer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with MPlayer; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPLAYER_MMAP_H
+#define MPLAYER_MMAP_H
+
+/*
+ * Protections are chosen from these bits, or-ed together
+ */
+#define PROT_NONE 0x00 /* no permissions */
+#define PROT_READ 0x01 /* pages can be read */
+#define PROT_WRITE 0x02 /* pages can be written */
+#define PROT_EXEC 0x04 /* pages can be executed */
+
+/*
+ * Flags contain sharing type and options.
+ * Sharing types; choose one.
+ */
+#define MAP_SHARED 0x0001 /* share changes */
+#define MAP_PRIVATE 0x0002 /* changes are private */
+#define MAP_FIXED 0x0010 /* map addr must be exactly as requested */
+
+/*
+ * Mapping type
+ */
+#define MAP_ANON 0x1000 /* allocated from memory, swap space */
+
+/* MAP_FAILED is defined in config.h */
+
+#ifndef _MMAP_DECLARED
+#define _MMAP_DECLARED
+void *mmap( void *addr, size_t len, int prot, int flags, int fildes, off_t off );
+#endif
+int munmap( void *addr, size_t len );
+int mprotect( void *addr, size_t len, int prot );
+
+#endif /* MPLAYER_MMAP_H */
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