110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
/*
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* Server-side file mapping management
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*
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* Copyright (C) 1999 Alexandre Julliard
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*/
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "winerror.h"
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#include "winnt.h"
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#include "server/process.h"
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#include "server/thread.h"
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struct mapping
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{
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struct object obj; /* object header */
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int size_high; /* mapping size */
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int size_low; /* mapping size */
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int protect; /* protection flags */
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struct file *file; /* file mapped */
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};
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static void mapping_dump( struct object *obj, int verbose );
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static void mapping_destroy( struct object *obj );
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static const struct object_ops mapping_ops =
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{
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mapping_dump,
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no_add_queue,
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NULL, /* should never get called */
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NULL, /* should never get called */
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NULL, /* should never get called */
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no_read_fd,
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no_write_fd,
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no_flush,
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no_get_file_info,
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mapping_destroy
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};
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struct object *create_mapping( int size_high, int size_low, int protect,
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int handle, const char *name )
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{
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struct mapping *mapping;
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if (!(mapping = (struct mapping *)create_named_object( name, &mapping_ops,
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sizeof(*mapping) )))
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return NULL;
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if (GET_ERROR() == ERROR_ALREADY_EXISTS)
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return &mapping->obj; /* Nothing else to do */
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mapping->size_high = size_high;
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mapping->size_low = size_low;
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mapping->protect = protect;
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if (handle != -1)
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{
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int access = 0;
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if (protect & VPROT_READ) access |= GENERIC_READ;
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if (protect & VPROT_WRITE) access |= GENERIC_WRITE;
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if (!(mapping->file = get_file_obj( current->process, handle, access )))
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{
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release_object( mapping );
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return NULL;
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}
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}
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else mapping->file = NULL;
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return &mapping->obj;
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}
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int open_mapping( unsigned int access, int inherit, const char *name )
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{
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return open_object( name, &mapping_ops, access, inherit );
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}
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int get_mapping_info( int handle, struct get_mapping_info_reply *reply )
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{
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struct mapping *mapping;
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int fd;
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if (!(mapping = (struct mapping *)get_handle_obj( current->process, handle,
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0, &mapping_ops )))
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return -1;
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reply->size_high = mapping->size_high;
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reply->size_low = mapping->size_low;
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reply->protect = mapping->protect;
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if (mapping->file) fd = file_get_mmap_fd( mapping->file );
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else fd = -1;
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release_object( mapping );
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return fd;
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}
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static void mapping_dump( struct object *obj, int verbose )
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{
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struct mapping *mapping = (struct mapping *)obj;
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assert( obj->ops == &mapping_ops );
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fprintf( stderr, "Mapping size=%08x%08x prot=%08x file=%p name='%s'\n",
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mapping->size_high, mapping->size_low, mapping->protect,
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mapping->file, get_object_name( &mapping->obj ) );
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}
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static void mapping_destroy( struct object *obj )
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{
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struct mapping *mapping = (struct mapping *)obj;
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assert( obj->ops == &mapping_ops );
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if (mapping->file) release_object( mapping->file );
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free( mapping );
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}
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