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-<html>
-<body>
-
-<h1>Heap Management in HDF5</h1>
-
-<pre>
-
-Heap functions are in the H5H package.
-
-
-off_t
-H5H_new (hdf5_file_t *f, size_t size_hint, size_t realloc_hint);
-
- Creates a new heap in the specified file which can efficiently
- store at least SIZE_HINT bytes. The heap can store more than
- that, but doing so may cause the heap to become less efficient
- (for instance, a heap implemented as a B-tree might become
- discontigous). The REALLOC_HINT is the minimum number of bytes
- by which the heap will grow when it must be resized. The hints
- may be zero in which case reasonable (but probably not
- optimal) values will be chosen.
-
- The return value is the address of the new heap relative to
- the beginning of the file boot block.
-
-off_t
-H5H_insert (hdf5_file_t *f, off_t addr, size_t size, const void *buf);
-
- Copies SIZE bytes of data from BUF into the heap whose address
- is ADDR in file F. BUF must be the _entire_ heap object. The
- return value is the byte offset of the new data in the heap.
-
-void *
-H5H_read (hdf5_file_t *f, off_t addr, off_t offset, size_t size, void *buf);
-
- Copies SIZE bytes of data from the heap whose address is ADDR
- in file F into BUF and then returns the address of BUF. If
- BUF is the null pointer then a new buffer will be malloc'd by
- this function and its address is returned.
-
- Returns buffer address or null.
-
-const void *
-H5H_peek (hdf5_file_t *f, off_t addr, off_t offset)
-
- A more efficient version of H5H_read that returns a pointer
- directly into the cache; the data is not copied from the cache
- to a buffer. The pointer is valid until the next call to an
- H5AC function directly or indirectly.
-
- Returns a pointer or null. Do not free the pointer.
-
-void *
-H5H_write (hdf5_file_t *f, off_t addr, off_t offset, size_t size,
- const void *buf);
-
- Modifies (part of) an object in the heap at address ADDR of
- file F by copying SIZE bytes from the beginning of BUF to the
- file. OFFSET is the address withing the heap where the output
- is to occur.
-
- This function can fail if the combination of OFFSET and SIZE
- would write over a boundary between two heap objects.
-
-herr_t
-H5H_remove (hdf5_file_t *f, off_t addr, off_t offset, size_t size);
-
- Removes an object or part of an object which begins at byte
- OFFSET within a heap whose address is ADDR in file F. SIZE
- bytes are returned to the free list. Removing the middle of
- an object has the side effect that one object is now split
- into two objects.
-
- Returns success or failure.
-
-===========================================
-Last Modified: 8 July 1998 (technical content)
-Last Modified: 28 April 2000 (included in HDF5 Technical Notes)
-HDF Help Desk: hdfhelp@ncsa.uiuc.edu
-
-</pre>
-
-</body>
-</html>