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* File: memory_object.h
* Author: Michael Wayne Young
* External memory management interface definition.
#pragma GCC visibility push(hidden)
* Initialize the specified memory object, providing
* a memory object control reference on which to make
* cache control calls.
* [To allow the mapping of this object to be used, the
* memory manager must call memory_object_set_attributes,
* specifying the "ready" parameter as TRUE. To reject
* all mappings of this object, the memory manager may
* use memory_object_destroy.]
extern kern_return_t memory_object_init(
* Indicates that the specified memory object is no longer
* mapped (or cached -- see memory_object_set_attributes),
* and that further mappings will cause another memory_object_init
* call to be made.
* [The kernel will release its reference on the memory object
* after this call returns. The memory object control associated
* with the memory object is no longer usable - the pager should
* drop the control reference granted to it by memory_object_init.]
extern kern_return_t memory_object_terminate(
* Request data from this memory object. At least
* the specified data should be returned with at
* least the specified access permitted.
* [Response should be upl commit over the specified range.]
extern kern_return_t memory_object_data_request(
* Return data to manager. This call is used in place of data_write
* for objects initialized by object_ready instead of set_attributes.
* This call indicates whether the returned data is dirty and whether
* the kernel kept a copy. Precious data remains precious if the
* kernel keeps a copy. The indication that the kernel kept a copy
* is only a hint if the data is not precious; the cleaned copy may
* be discarded without further notifying the manager.
* [response should be a upl_commit over the range specified]
extern kern_return_t memory_object_data_return(
* Provide initial data contents for this region of
* the memory object. If data has already been written
* to the object, this value must be discarded; otherwise,
* this call acts identically to memory_object_data_return.
* [response should be UPL commit over the specified range.]
extern kern_return_t memory_object_data_initialize(
* Notify the pager that the specified memory object
* has no other (mapped) references besides the named
* reference held by the pager itself.
* [Response should be a release of the named reference when
* the pager deems that appropriate.]
extern kern_return_t memory_object_map(
extern kern_return_t memory_object_last_unmap(
#pragma GCC visibility pop
#endif /* _MACH_MEMORY_OBJECT_H_ */