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[svn-r12885] Refactored the H5FD_direct_open and H5FD_direct_write. The condition for H5_HAVE_DIRECT_ALIGN

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not defined simply repeated the code above.  Merged this part into the code above.  No other
significant change.
This commit is contained in:
Raymond Lu 2006-11-09 08:44:44 -05:00
parent 50c658d66d
commit e6ef14ff32
1 changed files with 23 additions and 79 deletions
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102
src/H5FDdirect.c
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@ -861,8 +861,8 @@ H5FD_direct_read(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, ha
{
H5FD_direct_t *file = (H5FD_direct_t*)_file;
ssize_t nbytes;
hbool_t must_align = TRUE;
herr_t ret_value=SUCCEED; /* Return value */
#ifdef H5_HAVE_DIRECT_ALIGN
size_t alloc_size;
void *copy_buf, *p2, *p3;
size_t _boundary;
@ -870,7 +870,6 @@ H5FD_direct_read(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, ha
size_t _cbsize;
haddr_t copy_addr = addr;
size_t copy_size = size;
#endif /*H5_HAVE_DIRECT_ALIGN*/
FUNC_ENTER_NOAPI(H5FD_direct_read, FAIL)
@ -885,7 +884,13 @@ H5FD_direct_read(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, ha
if (addr+size>file->eoa)
HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow")
#ifdef H5_HAVE_DIRECT_ALIGN /* If the system requires data to be aligned */
#ifndef H5_HAVE_DIRECT_ALIGN
/* If the system doesn't require data to be aligned, read the data in
* the same way as sec2 driver.
*/
must_align = FALSE;
#endif
/* Get the memory boundary for alignment, file system block size, and maximal
* copy buffer size.
*/
@ -893,10 +898,11 @@ H5FD_direct_read(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, ha
_fbsize = file->fa.fbsize;
_cbsize = file->fa.cbsize;
/* if the data is aligned, read it directly from the file. If not, read a bigger
/* if the data is aligned or the system doesn't require data to be aligned,
* read it directly from the file. If not, read a bigger
* and aligned data first, then copy the data into memory buffer.
*/
if((addr%_fbsize==0) && (size%_fbsize==0) && ((size_t)buf%_boundary==0)) {
if(!must_align || ((addr%_fbsize==0) && (size%_fbsize==0) && ((size_t)buf%_boundary==0))) {
/* Seek to the correct location */
if ((addr!=file->pos || OP_READ!=file->op) &&
file_seek(file->fd, (file_offset_t)addr, SEEK_SET)<0)
@ -988,42 +994,6 @@ H5FD_direct_read(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, ha
HDfree(copy_buf);
}
#else /*H5_HAVE_DIRECT_ALIGN*/
/* If the system doesn't require data to be aligned, read the data in
* the same way as sec2 driver.
*/
/* Seek to the correct location */
if ((addr!=file->pos || OP_READ!=file->op) &&
file_seek(file->fd, (file_offset_t)addr, SEEK_SET)<0)
HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to seek to proper position")
/*
* Read data, being careful of interrupted system calls, partial results,
* and the end of the file.
*/
while (size>0) {
do {
nbytes = HDread(file->fd, buf, size);
} while (-1==nbytes && EINTR==errno);
if (-1==nbytes) /* error */
HSYS_GOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "file read failed")
if (0==nbytes) {
/* end of file but not end of format address space */
HDmemset(buf, 0, size);
break;
}
assert(nbytes>=0);
assert((size_t)nbytes<=size);
H5_CHECK_OVERFLOW(nbytes,ssize_t,size_t);
size -= (size_t)nbytes;
H5_CHECK_OVERFLOW(nbytes,ssize_t,haddr_t);
addr += (haddr_t)nbytes;
buf = (char*)buf + nbytes;
}
#endif /*H5_HAVE_DIRECT_ALIGN*/
/* Update current position */
file->pos = addr;
file->op = OP_READ;
@ -1063,8 +1033,8 @@ H5FD_direct_write(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, h
{
H5FD_direct_t *file = (H5FD_direct_t*)_file;
ssize_t nbytes;
hbool_t must_align = TRUE;
herr_t ret_value=SUCCEED; /* Return value */
#ifdef H5_HAVE_DIRECT_ALIGN
size_t alloc_size;
void *copy_buf, *p1, *p3;
size_t _boundary;
@ -1072,7 +1042,6 @@ H5FD_direct_write(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, h
size_t _cbsize;
haddr_t copy_addr = addr;
size_t copy_size = size;
#endif /*H5_HAVE_DIRECT_ALIGN*/
FUNC_ENTER_NOAPI(H5FD_direct_write, FAIL)
@ -1087,7 +1056,13 @@ H5FD_direct_write(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, h
if (addr+size>file->eoa)
HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow")
#ifdef H5_HAVE_DIRECT_ALIGN /* If the system requires data to be aligned */
#ifndef H5_HAVE_DIRECT_ALIGN
/* If the system doesn't require data to be aligned, read the data in
* the same way as sec2 driver.
*/
must_align = FALSE;
#endif
/* Get the memory boundary for alignment, file system block size, and maximal
* copy buffer size.
*/
@ -1095,11 +1070,11 @@ H5FD_direct_write(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, h
_fbsize = file->fa.fbsize;
_cbsize = file->fa.cbsize;
/* if the data is aligned, write it directly to the file. If not, read in
* the aligned data first, update buffer with user data, then write the
* data out.
/* if the data is aligned or the system doesn't require data to be aligned,
* write it directly to the file. If not, read a bigger and aligned data
* first, update buffer with user data, then write the data out.
*/
if((addr%_fbsize==0) && (size%_fbsize==0) && ((size_t)buf%_boundary==0)) {
if(!must_align || ((addr%_fbsize==0) && (size%_fbsize==0) && ((size_t)buf%_boundary==0))) {
/* Seek to the correct location */
if ((addr!=file->pos || OP_WRITE!=file->op) &&
file_seek(file->fd, (file_offset_t)addr, SEEK_SET)<0)
@ -1204,37 +1179,6 @@ H5FD_direct_write(H5FD_t *_file, H5FD_mem_t UNUSED type, hid_t UNUSED dxpl_id, h
HDfree(copy_buf);
}
#else /*H5_HAVE_DIRECT_ALIGN*/
/* If the system doesn't require data to be aligned, write the data in
* the same way as sec2 driver.
*/
/* Seek to the correct location */
if ((addr!=file->pos || OP_WRITE!=file->op) &&
file_seek(file->fd, (file_offset_t)addr, SEEK_SET)<0)
HSYS_GOTO_ERROR(H5E_IO, H5E_SEEKERROR, FAIL, "unable to seek to proper position")
/*
* Write the data, being careful of interrupted system calls and partial
* results
*/
while (size>0) {
do {
nbytes = HDwrite(file->fd, buf, size);
} while (-1==nbytes && EINTR==errno);
if (-1==nbytes) /* error */
HSYS_GOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
assert(nbytes>0);
assert((size_t)nbytes<=size);
H5_CHECK_OVERFLOW(nbytes,ssize_t,size_t);
size -= (size_t)nbytes;
H5_CHECK_OVERFLOW(nbytes,ssize_t,haddr_t);
addr += (haddr_t)nbytes;
buf = (const char*)buf + nbytes;
}
#endif /*H5_HAVE_DIRECT_ALIGN*/
/* Update current position and eof */
file->pos = addr;
file->op = OP_WRITE;