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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by the Board of Trustees of the University of Illinois. *
+ * All rights reserved. *
+ * *
+ * This file is part of HDF5. The full HDF5 copyright notice, including *
+ * terms governing use, modification, and redistribution, is contained in *
+ * the files COPYING and Copyright.html. COPYING can be found at the root *
+ * of the source code distribution tree; Copyright.html can be found at the *
+ * root level of an installed copy of the electronic HDF5 document set and *
+ * is linked from the top-level documents page. It can also be found at *
+ * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
+ * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created: H5HFcache.c
+ * Feb 24 2006
+ * Quincey Koziol <koziol@ncsa.uiuc.edu>
+ *
+ * Purpose: Implement fractal heap metadata cache methods.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/****************/
+/* Module Setup */
+/****************/
+
+#define H5HF_PACKAGE /*suppress error about including H5HFpkg */
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h" /* Generic Functions */
+#include "H5HFpkg.h" /* Fractal heaps */
+#include "H5Eprivate.h" /* Error handling */
+
+/****************/
+/* Local Macros */
+/****************/
+
+/* Fractal heap format version #'s */
+#define H5HF_HDR_VERSION 0 /* Header */
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+/* Metadata cache callbacks */
+static H5HF_t *H5HF_cache_hdr_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *_type, void *udata);
+static herr_t H5HF_cache_hdr_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr, H5HF_t *fh);
+static herr_t H5HF_cache_hdr_clear(H5F_t *f, H5HF_t *fh, hbool_t destroy);
+static herr_t H5HF_cache_hdr_size(const H5F_t *f, const H5HF_t *fh, size_t *size_ptr);
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+/* H5HF inherits cache-like properties from H5AC */
+const H5AC_class_t H5AC_FHEAP_HDR[1] = {{
+ H5AC_FHEAP_HDR_ID,
+ (H5AC_load_func_t)H5HF_cache_hdr_load,
+ (H5AC_flush_func_t)H5HF_cache_hdr_flush,
+ (H5AC_dest_func_t)H5HF_cache_hdr_dest,
+ (H5AC_clear_func_t)H5HF_cache_hdr_clear,
+ (H5AC_size_func_t)H5HF_cache_hdr_size,
+}};
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+/* Declare a free list to manage B-tree header data to/from disk */
+H5FL_BLK_DEFINE_STATIC(header_block);
+
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5HF_cache_hdr_load
+ *
+ * Purpose: Loads a fractal heap header from the disk.
+ *
+ * Return: Success: Pointer to a new fractal heap
+ *
+ * Failure: NULL
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 24 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+static H5HF_t *
+H5HF_cache_hdr_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void UNUSED *udata1, void UNUSED *udata2)
+{
+ H5HF_t *fh = NULL; /* Fractal heap info */
+ size_t size; /* Header size */
+ uint8_t *buf = NULL; /* Temporary buffer */
+ uint8_t *p; /* Pointer into raw data buffer */
+ H5HF_type_t heap_type; /* Type of heap */
+ uint32_t metadata_chksum; /* Metadata checksum value */
+ H5HF_t *ret_value; /* Return value */
+
+ FUNC_ENTER_NOAPI(H5HF_cache_hdr_load, NULL)
+
+ /* Check arguments */
+ HDassert(f);
+ HDassert(H5F_addr_defined(addr));
+
+ /* Allocate space for the fractal heap data structure */
+ if(NULL == (fh = H5FL_MALLOC(H5HF_t)))
+ HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+ HDmemset(&fh->cache_info, 0, sizeof(H5AC_info_t));
+
+ /* Compute the size of the fractal heap header on disk */
+ size = H5HF_HEADER_SIZE(f);
+
+ /* Allocate temporary buffer */
+ if((buf = H5FL_BLK_MALLOC(header_block, size)) == NULL)
+ HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+
+ /* Read header from disk */
+ if(H5F_block_read(f, H5FD_MEM_FHEAP_HDR, addr, size, dxpl_id, buf) < 0)
+ HGOTO_ERROR(H5E_HEAP, H5E_READERROR, NULL, "can't read fractal heap header")
+
+ p = buf;
+
+ /* magic number */
+ if(HDmemcmp(p, H5HF_HDR_MAGIC, H5HF_SIZEOF_MAGIC))
+ HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, NULL, "wrong fractal heap header signature")
+ p += H5HF_SIZEOF_MAGIC;
+
+ /* version */
+ if(*p++ != H5HF_HDR_VERSION)
+ HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, NULL, "wrong fractal heap header version")
+
+ /* Metadata flags (unused, currently) */
+/* XXX: Plan out metadata flags (including "read-only duplicate" feature) */
+ if(*p++ != 0)
+ HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, NULL, "unknown metadata flag in fractal heap header")
+
+ /* Metadata checksum (unused, currently) */
+ UINT32DECODE(p, metadata_chksum);
+/* XXX: Verify checksum */
+ if(metadata_chksum != 0)
+ HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, NULL, "incorrect metadata checksum for fractal heap header")
+
+ /* Fractal heap type */
+ heap_type = *p++;
+ HDassert(H5HF_ABSOLUTE == 0);
+ if(heap_type > H5HF_MAPPED)
+ HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, NULL, "incorrect fractal heap type")
+
+ /* Initialize shared fractal heap info */
+ if(H5HF_shared_init(f, fh, heap_type) < 0)
+ HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "can't create shared fractal heap info")
+
+ /* Set return value */
+ ret_value = fh;
+
+done:
+ if(buf)
+ H5FL_BLK_FREE(header_block, buf);
+ if(!ret_value && fh)
+ (void)H5HF_cache_hdr_dest(f, fh);
+
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5HF_cache_hdr_load() */ /*lint !e818 Can't make udata a pointer to const */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5HF_cache_hdr_flush
+ *
+ * Purpose: Flushes a dirty fractal heap header to disk.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 24 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5HF_cache_hdr_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr, H5HF_t *fh)
+{
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_NOAPI(H5HF_cache_hdr_flush, FAIL)
+
+ /* check arguments */
+ HDassert(f);
+ HDassert(H5F_addr_defined(addr));
+ HDassert(fh);
+
+ if(fh->cache_info.is_dirty) {
+ H5HF_shared_t *shared; /* Shared fractal heap information */
+ uint8_t *buf = NULL; /* Temporary raw data buffer */
+ uint8_t *p; /* Pointer into raw data buffer */
+ size_t size; /* Header size on disk */
+
+ /* Get the pointer to the shared B-tree info */
+ shared = H5RC_GET_OBJ(fh->shared);
+ HDassert(shared);
+
+ /* Compute the size of the B-tree header on disk */
+ size = H5HF_HEADER_SIZE(f);
+
+ /* Allocate temporary buffer */
+ if((buf = H5FL_BLK_MALLOC(header_block, size)) == NULL)
+ HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
+
+ p = buf;
+
+ /* Magic number */
+ HDmemcpy(p, H5HF_HDR_MAGIC, H5HF_SIZEOF_MAGIC);
+ p += H5HF_SIZEOF_MAGIC;
+
+ /* Version # */
+ *p++ = H5HF_HDR_VERSION;
+
+ /* Metadata status flags */
+/* XXX: Set this? */
+ *p++ = 0;
+
+ /* Metadata checksum */
+/* XXX: Set this! (After all the metadata is in the buffer) */
+ HDmemset(p, 0, 4);
+ p += 4;
+
+ /* Fractal heap type */
+ *p++ = shared->type;
+
+ /* Write the B-tree header. */
+ HDassert((size_t)(p - buf) == size);
+ if(H5F_block_write(f, H5FD_MEM_FHEAP_HDR, addr, size, dxpl_id, buf) < 0)
+ HGOTO_ERROR(H5E_HEAP, H5E_CANTFLUSH, FAIL, "unable to save fractal heap header to disk")
+
+ H5FL_BLK_FREE(header_block, buf);
+
+ fh->cache_info.is_dirty = FALSE;
+ } /* end if */
+
+ if(destroy)
+ if(H5HF_cache_hdr_dest(f, fh) < 0)
+ HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to destroy fractal heap header")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* H5HF_cache_hdr_flush() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5HF_cache_hdr_dest
+ *
+ * Purpose: Destroys a fractal heap header in memory.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 24 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+/* ARGSUSED */
+herr_t
+H5HF_cache_hdr_dest(H5F_t UNUSED *f, H5HF_t *fh)
+{
+ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5HF_cache_hdr_dest)
+
+ /*
+ * Check arguments.
+ */
+ HDassert(fh);
+
+ /* Decrement reference count on shared fractal heap info */
+ if(fh->shared)
+ H5RC_DEC(fh->shared);
+
+ /* Free fractal heap header info */
+ H5FL_FREE(H5HF_t, fh);
+
+ FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5HF_cache_hdr_dest() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5HF_cache_hdr_clear
+ *
+ * Purpose: Mark a fractal heap header in memory as non-dirty.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 24 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5HF_cache_hdr_clear(H5F_t *f, H5HF_t *fh, hbool_t destroy)
+{
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_NOAPI_NOINIT(H5HF_cache_hdr_clear)
+
+ /*
+ * Check arguments.
+ */
+ HDassert(fh);
+
+ /* Reset the dirty flag. */
+ fh->cache_info.is_dirty = FALSE;
+
+ if(destroy)
+ if(H5HF_cache_hdr_dest(f, fh) < 0)
+ HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to destroy fractal heap header")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5HF_cache_hdr_clear() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5HF_cache_hdr_size
+ *
+ * Purpose: Compute the size in bytes of a fractal heap header
+ * on disk, and return it in *size_ptr. On failure,
+ * the value of *size_ptr is undefined.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 24 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5HF_cache_hdr_size(const H5F_t *f, const H5HF_t UNUSED *fh, size_t *size_ptr)
+{
+ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5HF_cache_hdr_size)
+
+ /* check arguments */
+ HDassert(f);
+ HDassert(size_ptr);
+
+ /* Set size value */
+ *size_ptr = H5HF_HEADER_SIZE(f);
+
+ FUNC_LEAVE_NOAPI(SUCCEED)
+} /* H5HF_cache_hdr_size() */
+