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| author | Robert Kim Yates <rkyates@llnl.gov> | 1998-12-07 23:13:05 (GMT) |
|---|---|---|
| committer | Robert Kim Yates <rkyates@llnl.gov> | 1998-12-07 23:13:05 (GMT) |
| commit | bf250c6bb28b13f3a4f986a6eab52c5c70ee84b6 (patch) | |
| tree | f0ca8e2b051e7655bab30c06a9398e742b212858 /src/H5Distore.c | |
| parent | b58e9a6253c5b0a5beff9bd444f68cf64c2533e9 (diff) | |
| download | hdf5-bf250c6bb28b13f3a4f986a6eab52c5c70ee84b6.zip hdf5-bf250c6bb28b13f3a4f986a6eab52c5c70ee84b6.tar.gz hdf5-bf250c6bb28b13f3a4f986a6eab52c5c70ee84b6.tar.bz2 | |
[svn-r960] Added interprocess coordination in H5F_istore_allocate around calls to
H5F_istore_lock and H5F_istore_inlock to prevent race between reading and
writing data chunks that caused "holes" (i.e., sequences of 0s)
in chunked datasets.
Diffstat (limited to 'src/H5Distore.c')
| -rw-r--r-- | src/H5Distore.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/H5Distore.c b/src/H5Distore.c index 89d087c..4d2d0dd 100644 --- a/src/H5Distore.c +++ b/src/H5Distore.c @@ -2054,6 +2054,10 @@ H5F_istore_get_addr (H5F_t *f, const H5O_layout_t *layout, * rky 980923 * Added barrier to preclude racing with data writes. * + * rky 19981207 + * Added Wait-Signal wrapper around unlock-lock critical region + * to prevent race condition (unlock reads, lock writes the chunk). + * *------------------------------------------------------------------------- */ herr_t @@ -2118,6 +2122,14 @@ H5F_istore_allocate (H5F_t *f, const H5O_layout_t *layout, * Lock the chunk, copy from application to chunk, then unlock the * chunk. */ + + /* rky 981207 Serialize access to this critical region. */ + if (SUCCEED!= + H5PC_Wait_for_left_neighbor(f->shared->access_parms->u.mpio.comm)) + { + HRETURN_ERROR (H5E_IO, H5E_WRITEERROR, FAIL, + "unable to lock the data chunk"); + } if (NULL==(chunk=H5F_istore_lock (f, layout, split_ratios, pline, fill, chunk_offset, FALSE, &idx_hint))) { @@ -2130,6 +2142,12 @@ H5F_istore_allocate (H5F_t *f, const H5O_layout_t *layout, HRETURN_ERROR (H5E_IO, H5E_WRITEERROR, FAIL, "uanble to unlock raw data chunk"); } + if (SUCCEED!= + H5PC_Signal_right_neighbor(f->shared->access_parms->u.mpio.comm)) + { + HRETURN_ERROR (H5E_IO, H5E_WRITEERROR, FAIL, + "unable to unlock the data chunk"); + } #ifdef NO } else { #ifdef AKC |