56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
#include <stasis/bufferPool.h>
|
|
#include <stasis/io/handle.h>
|
|
/**
|
|
* Write page to disk, including correct LSN. Doing so may require a
|
|
* call to logSync(). There is not much that can be done to avoid
|
|
* this call right now. In the future, it might make sense to check
|
|
* to see if some other page can be kicked, in order to avoid the log
|
|
* flush.
|
|
*
|
|
* This funciton is automatically called immediately before a page is
|
|
* evicted from cache. Operation implementors, and normal users
|
|
* should never have to call this routine.
|
|
*
|
|
* @see bufferManager.c for the implementation of pageWrite
|
|
*
|
|
* @param dat The page to be flushed to disk. No concurrent calls
|
|
* may have the same value of dat.
|
|
*/
|
|
extern void (*pageWrite)(Page * dat);
|
|
|
|
extern int pageFile_isDurable;
|
|
|
|
/**
|
|
Read a page from disk. This bypassess the cache, and should only be
|
|
called by bufferManager and blobManager. To retrieve a page under
|
|
normal circumstances, use loadPage() instead.
|
|
|
|
Operation implementors and normal users should never need to call
|
|
this routine.
|
|
|
|
@param ret A page struct, with id set correctly. The rest of this
|
|
struct will be overwritten by pageMap. This method assumes that no
|
|
concurrent calls will be passed the same value of ret.
|
|
|
|
@see bufferManager.c for the implementation of pageRead.
|
|
|
|
@todo pageRead and pageWrite should be stored in a struct returned by
|
|
an initailizer, not in global function pointers.
|
|
*/
|
|
extern void (*pageRead)(Page * ret);
|
|
/**
|
|
Force the page file to disk. Pages that have had pageWrite()
|
|
called on them are guaranteed to be on disk after this returns.
|
|
|
|
(Note that bufferManager implementations typically call pageWrite()
|
|
automatically, so in general, other pages could be written back
|
|
as well...)
|
|
*/
|
|
extern void (*forcePageFile)();
|
|
extern void (*forceRangePageFile)();
|
|
/**
|
|
Force the page file to disk, then close it.
|
|
*/
|
|
extern void (*closePageFile)();
|
|
|
|
void pageHandleOpen(stasis_handle_t * handle);
|