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