Merge pull request #1590 in HDFFV/hdf5 from ~LRKNOX/hdf5_lrk:1.10/master to 1.10/masterhdf5-1_10_5

* commit '6819c11508b0610f222fe3bfe8a19f637bf4319c': (154 commits)
  CMake needs a tar.gz examples file for windows, too.
  Correct file permissions on README.txt.
  Address merge anomalies and incorrect file permissions.
  Update release date in README.txt and RELEASE.txt.
  Revisions to Platforms tested.
  Updated LT_VERS_AGE in config/lt_vers.am due to reinstatement of previously removed symbols, then ran autogen.sh to propagate so number changes and H5E_LOGFAIL_g addition to files checked in on release branch.
  Updated H5err.txt to replace a global variable that was removed during the metadata cache logging changes (to maintain binary compatibility).
  HDFFV-10552,10686 restore H5O_*1 functions
  Minor fix in h5str_sprintf for NULL region references
  Add new files to MANIFEST.
  Update so version numbers. fix 2 typos.
  Update RELEASE.txt for TRILABS-34 and remove unused sections.
  Add script for building HDF5 with CMake on HPC machines that use sbatch. Add README file for inclusion in CMake-hdf5-<version>.tar.gz file. Add updated README_HPC file with cross compile instructions.
  set version to 1.10.5-pre1. Change default build mode to production.
  Merge pull request #1560 in HDFFV/hdf5 from hdf5-1-10-documentation-only to hdf5_1_10_5
  Update HISTORY-1_10.txt and RELEASE.txt files.
  Modify RELEASE.txt in response to PR comments
  Check in files generated by autogen.sh for hdf5_1_10_5 release branch.
  Check in files generated by autogen.sh for hdf5_1_10_5 release branch. 2019/02/16.
  Code improvement
  ...

1 files changed, 12 insertions, 38 deletions

diff --git a/src/H5Cpkg.h b/src/H5Cpkg.h
index 98d7a01..9156c0d 100644
--- a/src/H5Cpkg.h
+++ b/src/H5Cpkg.h
@@ -37,6 +37,7 @@
 #include "H5Cprivate.h"
 
 /* Other private headers needed by this file */
+#include "H5Clog.h"             /* Cache logging */
 #include "H5SLprivate.h"        /* Skip lists */
 
 /**************************/
@@ -3497,40 +3498,8 @@ typedef struct H5C_tag_info_t {
  * flush_in_progress: Boolean flag indicating whether a flush is in
  * 		progress.
  *
- * trace_file_ptr:  File pointer pointing to the trace file, which is used
- *              to record cache operations for use in simulations and design
- *              studies.  This field will usually be NULL, indicating that
- *              no trace file should be recorded.
- *
- *              Since much of the code supporting the parallel metadata
- *              cache is in H5AC, we don't write the trace file from
- *              H5C.  Instead, H5AC reads the trace_file_ptr as needed.
- *
- *              When we get to using H5C in other places, we may add
- *              code to write trace file data at the H5C level as well.
- *
- * logging_enabled: Boolean flag indicating whether cache logging
- *              which is used to record cache operations for use in
- *              debugging and performance analysis. When this flag is set
- *              to TRUE, it means that the log file is open and ready to
- *              receive log entries. It does NOT mean that cache operations
- *              are currently being recorded. That is controlled by the
- *              currently_logging flag (below).
- *
- *              Since much of the code supporting the parallel metadata
- *              cache is in H5AC, we don't write the trace file from
- *              H5C.  Instead, H5AC reads the trace_file_ptr as needed.
- *
- *              When we get to using H5C in other places, we may add
- *              code to write trace file data at the H5C level as well.
- *
- * currently_logging: Boolean flag that indicates if cache operations are
- *              currently being logged. This flag is flipped by the
- *              H5Fstart/stop_mdc_logging functions.
- *
- * log_file_ptr:  File pointer pointing to the log file. The I/O functions
- *              in stdio.h are used to write to the log file regardless of
- *              the VFD selected.
+ * log_info:    Information used by the MDC logging functionality.
+ *              Described in H5Clog.h.
  *
  * aux_ptr:	Pointer to void used to allow wrapper code to associate
  *		its data with an instance of H5C_t.  The H5C cache code
@@ -3854,6 +3823,13 @@ typedef struct H5C_tag_info_t {
  *
  * ignore_tags:	Boolean flag to disable tag validation during entry insertion.
  *
+ * num_objs_corked: Unsigned integer field containing the number of objects
+ *                  that are "corked".  The "corked" status of an object is
+ *                  found by searching the "tag_list".  This field is added
+ *                  for optimization so that the skip list search on "tag_list" 
+ *                  can be skipped if this field is zero, i.e. no "corked"
+ *                  objects.
+ *
  * When a cache entry is protected, it must be removed from the LRU
  * list(s) as it cannot be either flushed or evicted until it is unprotected.
  * The following fields are used to implement the protected list (pl).
@@ -4676,10 +4652,7 @@ typedef struct H5C_tag_info_t {
 struct H5C_t {
     uint32_t			magic;
     hbool_t			flush_in_progress;
-    FILE *			trace_file_ptr;
-    hbool_t                     logging_enabled;
-    hbool_t                     currently_logging;
-    FILE *			log_file_ptr;
+    H5C_log_info_t  *log_info;
     void *			aux_ptr;
     int32_t			max_type_id;
     const H5C_class_t * const   *class_table_ptr;
@@ -4727,6 +4700,7 @@ struct H5C_t {
     /* Fields for maintaining list of tagged entries */
     H5SL_t *                    tag_list;
     hbool_t                     ignore_tags;
+    uint32_t			        num_objs_corked;
 
     /* Fields for tracking protected entries */
     uint32_t                    pl_len;