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Diffstat (limited to 'include/mach/memory_object.h')
| -rw-r--r-- | include/mach/memory_object.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/include/mach/memory_object.h b/include/mach/memory_object.h new file mode 100644 index 00000000..b4dd71f7 --- /dev/null +++ b/include/mach/memory_object.h @@ -0,0 +1,83 @@ +/* + * Mach Operating System + * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ +/* + * File: memory_object.h + * Author: Michael Wayne Young + * + * External memory management interface definition. + */ + +#ifndef _MACH_MEMORY_OBJECT_H_ +#define _MACH_MEMORY_OBJECT_H_ + +/* + * User-visible types used in the external memory + * management interface: + */ + +#include <mach/port.h> + +typedef mach_port_t memory_object_t; + /* Represents a memory object ... */ + /* Used by user programs to specify */ + /* the object to map; used by the */ + /* kernel to retrieve or store data */ + +typedef mach_port_t memory_object_control_t; + /* Provided to a memory manager; ... */ + /* used to control a memory object */ + +typedef mach_port_t memory_object_name_t; + /* Used to describe the memory ... */ + /* object in vm_regions() calls */ + +typedef int memory_object_copy_strategy_t; + /* How memory manager handles copy: */ +#define MEMORY_OBJECT_COPY_NONE 0 + /* ... No special support */ +#define MEMORY_OBJECT_COPY_CALL 1 + /* ... Make call on memory manager */ +#define MEMORY_OBJECT_COPY_DELAY 2 + /* ... Memory manager doesn't ... */ + /* change data externally. */ +#define MEMORY_OBJECT_COPY_TEMPORARY 3 + /* ... Memory manager doesn't ... */ + /* change data externally, and */ + /* doesn't need to see changes. */ + +typedef int memory_object_return_t; + /* Which pages to return to manager + this time (lock_request) */ +#define MEMORY_OBJECT_RETURN_NONE 0 + /* ... don't return any. */ +#define MEMORY_OBJECT_RETURN_DIRTY 1 + /* ... only dirty pages. */ +#define MEMORY_OBJECT_RETURN_ALL 2 + /* ... dirty and precious pages. */ + +#define MEMORY_OBJECT_NULL MACH_PORT_NULL + +#endif /* _MACH_MEMORY_OBJECT_H_ */ |