* add many unit tests

2010-01-28 22:21:57 +02:00 · 2010-01-28 22:21:57 +02:00 · c5dc8f044d
parent a411a9964b
commit c5dc8f044d
20 changed files with 1628 additions and 21 deletions
--- a/Makefile.am
+++ b/Makefile.am
@ -18,9 +18,12 @@ include $(top_srcdir)/gtest.mk

 SUBDIRS=src man

-
 # so we can say 'make test'
-check: test
+check: test cleanupnote
+
+cleanupnote:
+	@echo -e  "\nNote: you can remove the mu-test-XXXX dirs in your temp-file dir"
+	@echo "after 'make check' has finished."

 tags:
 	gtags
--- a/8
+++ b/8
@ -28,25 +28,25 @@
   - [X] cleanup ascending/descending stuff
   - [X] testing

-** release 0.7 [42%]
+** release 0.7 [46%]

   - [X] signal handler for indexing
   - [X] fix max 10000 matches limit
   - [X] embed database version in database
   - [X] MuMsgXapian => MuMsgIterXapian
   - [ ] don't store both values and terms
-   - [ ] clean up mu-msg-field
+   - [ ] clean up mu-msg-field, add formatting(?)
   - [X] fix the batch stuff
-   - [ ] mu help <cmd>
+   - [ ] mu help <cmd> (?)
   - [ ] mu view <path>
   - [ ] add symlink-following option for index
   - [ ] test suite
-   - [ ] moving msg field formatting to MuMsgField (?)
   - [ ] auto clean log file
   - [X] configure error for missing ->dt_dtype

 ** release 0.8 [%]
   - [ ] bookmarks
+   - [ ] query on time
   - [ ] mu-setup (?)
   - [ ] config system (config file) (?)
   - [ ] UTF-8 output to console
--- a/configure.ac
+++ b/configure.ac
@ -117,4 +117,4 @@ echo "<muhome>xapian-0.6 directory to save some disk space"

 echo
 echo "mu configuration is complete."
-echo "type 'make' to build it"
+echo "type 'make' to build mu, or 'make check' to perform the unit tests."
--- a/src/mu-maildir.h
+++ b/src/mu-maildir.h
@ -43,8 +43,7 @@ gboolean mu_maildir_mkmdir (const char* path, mode_t mode, gboolean noindex);


 /** 
- * create a symbolic link to a mail message; the function will
- * automatically
+ * create a symbolic link to a mail message
 * 
 * @param src the full path to the source message
 * @param targetpath the path to the target maildir; ie., *not*
@ -81,7 +80,8 @@ typedef MuResult (*MuMaildirWalkDirCallback)
 * files outside cur/ and new/ dirs and unreadable files; however,
 * dotdirs are visited (ie. '.dotdir/cur'), so this enables Maildir++.
 * (http://www.inter7.com/courierimap/README.maildirquota.html, search
- * for 'Mission statement')
+ * for 'Mission statement'). In addition, dirs containing a file named
+ * '.noindex' are ignored, as are their subdirectories.
 *
 * mu_walk_maildir stops if the callbacks return something different
 * from MU_OK. For example, it can return MU_STOP to stop the scan, or
--- a/src/mu-msg-str.c
+++ b/src/mu-msg-str.c
@ -18,6 +18,7 @@
 */

 #include <glib.h>
+
 #include "mu-msg-str.h"
 #include "mu-msg-flags.h"

@ -29,7 +30,7 @@ mu_msg_str_date_s (time_t t)

 	tmbuf = localtime(&t);
 	
-	strftime (buf, 64, "%c", tmbuf);
+	strftime (buf, sizeof(buf), "%c", tmbuf);

 	return buf;
 }
@ -49,9 +50,9 @@ mu_msg_str_size_s  (size_t s)
 	static char buf[32];
 	
 	if (s >= 1000 * 1000)
-		g_snprintf(buf, 32, "%.1fM", (double)s/(1000*1000));
+		g_snprintf(buf, sizeof(buf), "%.1f MB", (double)s/(1000*1000));
 	else
-		g_snprintf(buf, 32, "%.1fk", (double)s/(1000));
+		g_snprintf(buf, sizeof(buf), "%.1f kB", (double)s/(1000));

 	return buf;
 }
@ -91,7 +92,7 @@ mu_msg_str_prio  (MuMsgPriority prio)

 	default:
 		g_warning ("%s: invalid priority %d", __FUNCTION__, prio);
-		return "<error>";
+		return NULL;
 	}
 }

--- a/src/mu-msg-str.h
+++ b/src/mu-msg-str.h
@ -45,14 +45,15 @@ char*       mu_msg_str_date   (time_t t) G_GNUC_WARN_UNUSED_RESULT;


 /** 
- * get a display size for a given off_t;
- * uses M for sizes > 1000*1000, k for smaller sizes
+ * get a display size for a given size_t; uses M for sizes >
+ * 1000*1000, k for smaller sizes. Note: this function use the
+ * 10-based SI units, _not_ the powers-of-2 based ones.
 * 
 * mu_msg_str_size_s returns a ptr to a static buffer,
 * while mu_msg_str_size returns dynamically allocated
 * memory that must be freed after use.
 *
- * @param t the size as an off_t
+ * @param t the size as an size_t
 * 
 * @return a string representation of the size; see above
 * for what to do with it
@ -81,7 +82,7 @@ char*       mu_msg_str_flags    (MuMsgFlags flags) G_GNUC_WARN_UNUSED_RESULT;

 /** 
 * get a display string for a message priority; either
- * High,Low or Normal
+ * high, low or normal
 *
 * @param flags file flags
 * 
--- a/src/tests/Makefile.am
+++ b/src/tests/Makefile.am
@ -28,12 +28,13 @@ TEST_PROGS += test-mu-util
 test_mu_util_SOURCES= test-mu-util.c
 test_mu_util_LDADD=   ${top_srcdir}/src/libmu.la

-
 TEST_PROGS += test-mu-maildir
 test_mu_maildir_SOURCES= test-mu-maildir.c
 test_mu_maildir_LDADD=   ${top_srcdir}/src/libmu.la

-
+TEST_PROGS += test-mu-msg-str
+test_mu_msg_str_SOURCES= test-mu-msg-str.c
+test_mu_msg_str_LDADD=   ${top_srcdir}/src/libmu.la

 # note the question marks; make does not like files with ':'...
 # 11 messages, the '.ignore' message should be ignored when indexing
--- a/src/tests/test-mu-maildir.c
+++ b/src/tests/test-mu-maildir.c
@ -24,6 +24,8 @@
 #include <glib.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <string.h>
+

 #include "src/mu-maildir.h"

@ -127,13 +129,110 @@ static void
 shutup (void) {}


+static gchar*
+copy_test_data (void)
+{
+	gchar *dir, *cmd;
+	
+	dir = random_tmpdir();
+	cmd = g_strdup_printf ("mkdir %s", dir);
+	g_assert (g_spawn_command_line_sync (cmd, NULL, NULL, NULL, NULL));
+	g_free (cmd);
+	cmd = g_strdup_printf ("cp -R testdir %s", dir);
+	g_assert (g_spawn_command_line_sync (cmd, NULL, NULL, NULL, NULL));
+	g_free (cmd);
+	
+	return dir;
+}
+
+
+typedef struct {
+	int _file_count;
+	int _dir_entered;
+	int _dir_left;
+} WalkData;
+
+static MuResult
+dir_cb (const char *fullpath, gboolean enter, WalkData *data)
+{
+	if (enter)
+		++data->_dir_entered;
+	else
+		++data->_dir_left;
+
+	return MU_OK;
+}
+
+
+static MuResult
+msg_cb (const char *fullpath, gboolean enter, WalkData *data)
+{
+	++data->_file_count;
+	return MU_OK;
+}
+
+
+
+static void
+test_mu_maildir_walk_01 (void)
+{
+	char *tmpdir;
+	WalkData data;
+	MuResult rv;
+	
+	tmpdir = copy_test_data ();
+	memset (&data, 0, sizeof(WalkData));
+	
+	rv = mu_maildir_walk (tmpdir,
+			      (MuMaildirWalkMsgCallback)msg_cb, 
+			      (MuMaildirWalkDirCallback)dir_cb,
+			      &data);
+
+	g_assert_cmpuint (MU_OK, ==, rv);
+	g_assert_cmpuint (data._file_count, ==, 10);
+	g_assert_cmpuint (data._dir_entered,==, 5);
+	g_assert_cmpuint (data._dir_left,==, 5);
+
+	g_free (tmpdir);
+}
+
+
+static void
+test_mu_maildir_walk_02 (void)
+{
+	char *tmpdir, *cmd;
+	WalkData data;
+	MuResult rv;
+	
+	tmpdir = copy_test_data ();
+	memset (&data, 0, sizeof(WalkData));
+
+	/* mark the 'new' dir with '.noindex', to ignore it */ 
+	cmd = g_strdup_printf ("touch %s%ctestdir%cnew%c.noindex", tmpdir,
+			       G_DIR_SEPARATOR, G_DIR_SEPARATOR,
+			       G_DIR_SEPARATOR);
+	g_assert (g_spawn_command_line_sync (cmd, NULL, NULL, NULL, NULL));
+	g_free (cmd);
+		
+	rv = mu_maildir_walk (tmpdir,
+			      (MuMaildirWalkMsgCallback)msg_cb, 
+			      (MuMaildirWalkDirCallback)dir_cb,
+			      &data);
+
+	g_assert_cmpuint (MU_OK, ==, rv);
+	g_assert_cmpuint (data._file_count, ==, 6);
+	g_assert_cmpuint (data._dir_entered,==, 4);
+	g_assert_cmpuint (data._dir_left,==, 4);
+
+	g_free (tmpdir);
+}

 int
 main (int argc, char *argv[])
 {
 	g_test_init (&argc, &argv, NULL);

-	/* mu_util_dir_expand */
+	/* mu_util_maildir_mkmdir */
 	g_test_add_func ("/mu-maildir/mu-maildir-mkmdir-01",
 			 test_mu_maildir_mkmdir_01);
 	g_test_add_func ("/mu-maildir/mu-maildir-mkmdir-02",
@ -141,6 +240,12 @@ main (int argc, char *argv[])
 	g_test_add_func ("/mu-maildir/mu-maildir-mkmdir-03",
 			 test_mu_maildir_mkmdir_03);

+	/* mu_util_maildir_walk */
+	g_test_add_func ("/mu-maildir/mu-maildir-walk-01",
+			 test_mu_maildir_walk_01);
+	g_test_add_func ("/mu-maildir/mu-maildir-walk-02",
+			 test_mu_maildir_walk_02);
+	
 	g_log_set_handler (NULL,
 			   G_LOG_LEVEL_MASK | G_LOG_FLAG_FATAL| G_LOG_FLAG_RECURSION,
 			   (GLogFunc)shutup, NULL);
--- a/src/tests/test-mu-msg-str.c
+++ b/src/tests/test-mu-msg-str.c
@ -0,0 +1,162 @@
+/* 
+** Copyright (C) 2010 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
+**
+** This program is free software; you can redistribute it and/or modify it
+** under the terms of the GNU General Public License as published by the
+** Free Software Foundation; either version 3, or (at your option) any
+** later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software Foundation,
+** Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  
+**  
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /*HAVE_CONFIG_H*/
+
+#include <glib.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+
+#include <locale.h>
+#include "src/mu-msg-str.h"
+
+static void
+test_mu_msg_str_date_01 (void)
+{
+	struct tm *tmbuf;
+	char buf[64];
+	gchar *tmp;
+	time_t some_time;
+
+	some_time = 1234567890;
+	tmbuf = localtime (&some_time);
+	strftime (buf, 64, "%c", tmbuf);
+
+	/*  $ date -ud@1234567890; Fri Feb 13 23:31:30 UTC 2009 */
+	g_assert_cmpstr (mu_msg_str_date_s (some_time), ==, buf);
+
+	/* date -ud@987654321 Thu Apr 19 04:25:21 UTC 2001 */
+	some_time = 987654321;
+	tmbuf = localtime (&some_time);
+	strftime (buf, 64, "%c", tmbuf);
+	tmp = mu_msg_str_date (some_time);
+	
+	g_assert_cmpstr (tmp, ==, buf);
+	g_free (tmp);
+		
+}
+
+
+static void
+test_mu_msg_str_size_01 (void)
+{
+	struct lconv *lc;
+	char *tmp2;
+	
+	lc = localeconv();
+
+	tmp2 = g_strdup_printf ("0%s0 kB", lc->decimal_point);
+	g_assert_cmpstr (mu_msg_str_size_s (0),           ==,  tmp2);
+	g_free (tmp2);
+
+	tmp2 = g_strdup_printf ("100%s0 kB", lc->decimal_point);
+	g_assert_cmpstr (mu_msg_str_size_s (100000),      ==,  tmp2);
+	g_free (tmp2);
+
+	tmp2 = g_strdup_printf ("1%s1 MB", lc->decimal_point);
+	g_assert_cmpstr (mu_msg_str_size_s (1100*1000), ==,  tmp2);
+	g_free (tmp2);
+}
+
+	
+
+static void
+test_mu_msg_str_size_02 (void)
+{
+	struct lconv *lc;
+	char *tmp1, *tmp2;
+	
+	lc = localeconv();
+	
+	tmp2 = g_strdup_printf ("1%s0 MB", lc->decimal_point);
+	tmp1 = mu_msg_str_size (999999); 
+	g_assert_cmpstr (tmp1, !=, tmp2);
+
+	g_free (tmp1);
+	g_free (tmp2);
+}
+
+
+
+static void
+test_mu_msg_str_prio_01 (void)
+{
+	g_assert_cmpstr (mu_msg_str_prio(MU_MSG_PRIORITY_LOW), ==, "low");
+	g_assert_cmpstr (mu_msg_str_prio(MU_MSG_PRIORITY_NORMAL), ==, "normal");
+	g_assert_cmpstr (mu_msg_str_prio(MU_MSG_PRIORITY_HIGH), ==, "high");
+}
+
+
+static gboolean
+ignore_error (const char* log_domain, GLogLevelFlags log_level, const gchar* msg,
+	      gpointer user_data)
+{
+	return FALSE; /* don't abort */
+}
+
+
+static void
+test_mu_msg_str_prio_02 (void)
+{
+	/* this must fail */
+	g_test_log_set_fatal_handler ((GTestLogFatalFunc)ignore_error, NULL);
+
+	g_assert_cmpstr (mu_msg_str_prio(666), ==, NULL);
+}
+
+
+
+static void
+shutup (void) {}
+
+
+
+int
+main (int argc, char *argv[])
+{
+	g_test_init (&argc, &argv, NULL);
+
+	/* mu_msg_str_date */
+	g_test_add_func ("/mu-msg-str/mu-msg-str-date",
+			 test_mu_msg_str_date_01);
+
+	/* mu_msg_str_size */
+	g_test_add_func ("/mu-msg-str/mu-msg-str-size-01",
+			 test_mu_msg_str_size_01);
+	g_test_add_func ("/mu-msg-str/mu-msg-str-size-02",
+			 test_mu_msg_str_size_02);
+
+	/* mu_msg_str_prio */
+	g_test_add_func ("/mu-msg-str/mu-msg-str-prio-01",
+			 test_mu_msg_str_prio_01);
+	g_test_add_func ("/mu-msg-str/mu-msg-str-prio-02",
+			 test_mu_msg_str_prio_02);
+
+	/* FIXME: add tests for mu_msg_str_flags; but note the
+	 * function simply calls mu_msg_field_str */
+		
+	g_log_set_handler (NULL,
+			   G_LOG_LEVEL_MASK | G_LOG_FLAG_FATAL| G_LOG_FLAG_RECURSION,
+			   (GLogFunc)shutup, NULL);
+	
+	return g_test_run ();
+}
--- a/src/tests/test-util
+++ b/src/tests/test-util
--- a/src/tests/testdir/cur/1220863042.12663_1.mindcrime:2,S
+++ b/src/tests/testdir/cur/1220863042.12663_1.mindcrime:2,S
@ -0,0 +1,146 @@
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+Date: Thu, 31 Jul 2008 14:57:25 -0400
+From: anon@example.com
+Subject: gcc include search order
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+Content-Length: 3024
+
+
+Hi.
+In my unit testing I need to change some header files (target is
+vxWorks, which supports some things that the sun does not). 
+So, what I do is fetch the development tree, and then in a new unit test
+directory I attempt to compile the unit under test. Since this is NOT
+vxworks, I use sed to change some of the .h files and put them in a
+./changed directory.
+
+When I try to compile the file, it is still using the .h file from the
+original location, even though I have listed the include path for
+./changed before the include path for the development tree.
+
+Here is a partial output from gcc using the -v option
+
+GNU CPP version 3.1 (cpplib) (sparc ELF)
+GNU C++ version 3.1 (sparc-sun-solaris2.8)
+        compiled by GNU C version 3.1.
+ignoring nonexistent directory "NONE/include"
+#include "..." search starts here:
+#include <...> search starts here:
+ .
+ changed
+ /export/home4/xxx/yyyy/builds/int_rel5_latest/src/mp/interface
+ /export/home4/xxx/yyyy/builds/int_rel5_latest/src/ap/app
+ /export/home4/xxx/yyyy/builds/int_rel5_latest/src/shared/common
+ /export/home4/xxx/yyyy/builds/int_rel5_latest/src/shared/interface
+ /usr/local/include/g++-v3
+ /usr/local/include/g++-v3/sparc-sun-solaris2.8
+ /usr/local/include/g++-v3/backward
+ /usr/local/include
+ /usr/local/lib/gcc-lib/sparc-sun-solaris2.8/3.1/include
+ /usr/local/sparc-sun-solaris2.8/include
+ /usr/include
+End of search list.
+
+I know the changed file is correct and that the include is not working
+as expected, because when I copy the file from ./changed, back into the
+development tree, the compilation works as expected.
+
+One more bit of information. The source that I cam compiling is in
+/export/home4/xxx/yyyy/builds/int_rel5_latest/src/ap/app
+And it is including files from
+/export/home4/xxx/yyyy/builds/int_rel5_latest/src/shared/common
+These include files should be including the files from ./changed (when
+they exist) but they are ignoring the .h files in the ./changed
+directory and are instead using other, unchanged files in the
+/export/home4/xxx/yyyy/builds/int_rel5_latest/src/shared/common
+directory.
+
+The gcc command line is something like
+
+  TEST_DIR="."
+  
+  CHANGED_DIR_NAME=changed
+  CHANGED_FILES_DIR=${TEST_DIR}/${CHANGED_DIR_NAME}
+
+  CICU_HEADER_FILES="-I ${AP_INTERFACE_FILES} -I ${AP_APP_FILES} -I
+${SHARED_COMMON_FILES} -I ${SHARED_INTERFACE_FILES}"
+  
+  HEADERS="-I ./ -I ${CHANGED_FILES_DIR} ${CICU_HEADER_FILES}"
+  DEFINES="-DSUNRUN -DA10_DEBUG -DJOETEST"
+  
+  CFLAGS="-v -c -g -O1 -pipe -Wformat -Wunused -Wuninitialized -Wshadow
+-Wmissing-prototypes -Wmissing-declarations"
+  
+  printf "Compiling the UUT File\n"
+  gcc -fprofile-arcs -ftest-coverage ${CFLAGS} ${HEADERS} ${DEFINES}
+${AP_APP_FILES}/unitUnderTest.cpp 
+
+
+I hope this explanation is clear. If anyone knows how to fix the command
+line so that it gets the .h files in the "changed" directory are used
+instead of files in the other include directories.
+
+Thanks
+Joe
+
+----------------------------------------------------
+Time Flies like an Arrow. Fruit Flies like a Banana
+ 
+
--- a/src/tests/testdir/cur/1220863060.12663_3.mindcrime:2,S
+++ b/src/tests/testdir/cur/1220863060.12663_3.mindcrime:2,S
@ -0,0 +1,230 @@
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+Subject: Re: [sqlite-dev] SQLite exception
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+
+Hi Grant,
+
+Thanks for your reply.
+I am using a different session for each thread, whenever a thread wishes to
+access the database it gets a session from the session pool and works with
+that session until its work is done.
+
+Most of the actions the threads are doing on the database are quite
+complicated and are required to be fully committed or completely ignored, so
+yes, I am (most of the time) explicitly beginning and committing my
+transactions.
+
+Regarding the SQLiteStatementImpl, I believe the Poco manual explains that
+sessions and statements for that matter cannot be shared between threads,
+therefore if you are using a session via one thread only it should work
+fine.
+
+My first impression was that the problem was in the Poco infrastructure (I
+have found several Poco related bugs in the past), but the problem ALWAYS
+occurs when I perform the "BEGIN IMMEDIATE" action, if it were a Poco
+related bug, I would expect to see it here and there without any relation to
+this specific statement, but that is not the case.
+
+None the less, I will also post my question on the Poco forums.
+
+Nadav.
+
+On Sun, Aug 3, 2008 at 5:47 PM, Grant Gatchel <grant.gatchel@gmail.com>wrote:
+
+> Are you using the same Poco::Session for every thread or does each call
+> create a new session/handle to the database?
+>
+> Are you explicitly BEGINning and COMMITting your transactions?
+>
+> In looking at the 1.3.2 branch of Poco::Data::SQLite, there appears to be a
+> race condition in the SQLiteStatementImpl::next() method in which the member
+> _nextResponse is being accessed before the SQLiteStatementImpl::hasNext()
+> method has a chance to interpret that value and throw an exception.
+>
+> This question might be more suitable in the Poco forums or mailinglist.
+>
+> - Grant
+>
+> On Sun, Aug 3, 2008 at 8:33 AM, nadav g <nadav.gr@gmail.com> wrote:
+>
+>> Hi All,
+>>
+>> I have been using SQLite with Poco (www.appinf.com) as my infrastructure.
+>> The program is running several threads that access this database very
+>> often and are synchronized by SQLite itself.
+>> Everything seems to work just fine most of time (usually days - weeks) but
+>> I do get an occasional exception:
+>>
+>> Exception: SQL error or missing database: Iterator Error: trying to check
+>> if there is a next value
+>>
+>> The backtrace leads to this statement:
+>> *"BEGIN IMMEDIATE"*
+>>
+>> This specific code runs numerous times before an exception occurs (if
+>> occurs at all) and I cannot think of any reason for it to fail later rather
+>> than sooner.
+>> It is pretty obvious that this situation occurs due to some rare thread
+>> state, but I could not find any information that gives me any hint as to
+>> what this state might be.
+>>
+>> So what I am asking is:
+>> 1) Does anyone know why this sort of exception occurs?
+>> 2) Can anyone think of a reason for such an exception to occur in the
+>> situation I have described?
+>>
+>> Thanks in advance,
+>> Nadav.
+>>
+>>
+>> _______________________________________________
+>> sqlite-dev mailing list
+>> sqlite-dev@sqlite.org
+>> http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-dev
+>>
+>>
+>
+> _______________________________________________
+> sqlite-dev mailing list
+> sqlite-dev@sqlite.org
+> http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-dev
+>
+>
+
+------=_Part_29556_25702991.1217835502493
+Content-Type: text/html; charset=ISO-8859-1
+Content-Transfer-Encoding: 7bit
+Content-Disposition: inline
+
+<div dir="ltr">Hi Grant,<br><br>Thanks for your reply.<br>I am using a different session for each thread, whenever a thread wishes to access the database it gets a session from the session pool and works with that session until its work is done.<br>
+<br>Most of the actions the threads are doing on the database are quite complicated and are required to be fully committed or completely ignored, so yes, I am (most of the time) explicitly beginning and committing my transactions.<br>
+<br>Regarding the SQLiteStatementImpl, I believe the Poco manual explains that sessions and statements for that matter cannot be shared between threads, therefore if you are using a session via one thread only it should work fine.<br>
+<br>My first impression was that the problem was in the Poco infrastructure (I have found several Poco related bugs in the past), but the problem ALWAYS occurs when I perform the &quot;BEGIN IMMEDIATE&quot; action, if it were a Poco related bug, I would expect to see it here and there without any relation to this specific statement, but that is not the case.<br>
+<br>None the less, I will also post my question on the Poco forums.<br><br>Nadav.<br><br><div class="gmail_quote">On Sun, Aug 3, 2008 at 5:47 PM, Grant Gatchel <span dir="ltr">&lt;<a href="mailto:grant.gatchel@gmail.com">grant.gatchel@gmail.com</a>&gt;</span> wrote:<br>
+<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div dir="ltr">Are you using the same Poco::Session for every thread or does each call create a new session/handle to the database?<br>
+<br>Are you explicitly BEGINning and COMMITting your transactions?<br><br>In looking at the 1.3.2 branch of Poco::Data::SQLite, there appears to be a race condition in the SQLiteStatementImpl::next() method in which the member _nextResponse is being accessed before the SQLiteStatementImpl::hasNext() method has a chance to interpret that value and throw an exception.<br>
+
+<br>This question might be more suitable in the Poco forums or mailinglist.<br><br>- Grant<br>
+<br><div class="gmail_quote"><div><div></div><div class="Wj3C7c">
+On Sun, Aug 3, 2008 at 8:33 AM, nadav g <span dir="ltr">&lt;<a href="http://nadav.gr" target="_blank">nadav.gr</a>@<a href="http://gmail.com" target="_blank">gmail.com</a>&gt;</span> wrote:<br></div></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
+<div><div></div><div class="Wj3C7c">
+
+
+<div dir="ltr">Hi All,<br><br>I have been using SQLite with Poco (<a href="http://www.appinf.com" target="_blank">www.appinf.com</a>) as my infrastructure.<br>The program is running several threads that access this database very often and are synchronized by SQLite itself.<br>
+
+
+
+
+Everything seems to work just fine most of time (usually days - weeks) but I do get an occasional exception:<br><br>Exception: SQL error or missing database: Iterator Error: trying to check if there is a next value<br><br>
+
+
+
+
+The backtrace leads to this statement:<br><b>&quot;BEGIN IMMEDIATE&quot;</b><br><br>This specific code runs numerous times before an exception occurs (if occurs at all) and I cannot think of any reason for it to fail later rather than sooner.<br>
+
+
+
+
+It is pretty obvious that this situation occurs due to some rare thread state, but I could not find any information that gives me any hint as to what this state might be.<br><br>So what I am asking is:<br>1) Does anyone know why this sort of exception occurs?<br>
+
+
+
+
+2) Can anyone think of a reason for such an exception to occur in the situation I have described?<br><br>Thanks in advance,<br>Nadav.<br><br></div>
+<br></div></div>_______________________________________________<br>
+sqlite-dev mailing list<br>
+<a href="mailto:sqlite-dev@sqlite.org" target="_blank">sqlite-dev@sqlite.org</a><br>
+<a href="http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-dev" target="_blank">http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-dev</a><br>
+<br></blockquote></div><br></div>
+<br>_______________________________________________<br>
+sqlite-dev mailing list<br>
+<a href="mailto:sqlite-dev@sqlite.org">sqlite-dev@sqlite.org</a><br>
+<a href="http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-dev" target="_blank">http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-dev</a><br>
+<br></blockquote></div><br></div>
+
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+--===============2123623832==--
+
--- a/src/tests/testdir/cur/1220863087.12663_15.mindcrime:2,PS
+++ b/src/tests/testdir/cur/1220863087.12663_15.mindcrime:2,PS
@ -0,0 +1,136 @@
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+--=-=-=
+Content-Type: text/plain
+
+Xah <xahlee@gmail.com> writes:
+
+> So, i was reading about it in Wikipedia. Although i don't have a TV,
+> and haven't had since 2000, but i still enjoyed the festive spirits
+> anyhow. After all, i'm Chinese by blood. So, in my wandering, i ran
+> into this welcome song on youtube:
+>
+> http://www.youtube.com/watch?v=1HEndNYVhZo
+
+What is your point? Your email is in plain text and I can click on the
+link just fine- it is not exactly rocket science to implement parsing of
+URL's to workable links in an Email program (a lot of programs does
+that, including Gnus). Images can be included inline if you want. Also
+mail markups such as *this*, **this** and _this_ have been around since
+the Usenet days and displayed appropriately by a number of mailers. Like
+others have said, most html messages that I have seen either contains
+useless information, or are plain spam and can introduce a host of
+security problems in some mailers.
+
+Charles
+
+
+--=-=-=
+Content-Type: application/pgp-signature
+
+-----BEGIN PGP SIGNATURE-----
+Version: GnuPG v2.0.4-svn0 (GNU/Linux)
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+GtNVKdYAeftaYm1nwRVoCDA=
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+-----END PGP SIGNATURE-----
+--=-=-=--
+
+
+
--- a/src/tests/testdir/cur/1220863087.12663_19.mindcrime:2,S
+++ b/src/tests/testdir/cur/1220863087.12663_19.mindcrime:2,S
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+Subject: Re: Learning LISP; Scheme vs elisp.
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+
+On 2008-08-01, Thien-Thi Nguyen wrote:
+
+> warriors attack, felling foe after foe,
+> few growing old til they realize: to know
+> what deceit is worth deflection;
+> such receipt reversed rejection!
+> then their heavy arms, e'er transformed to shields:
+> balanced hooked charms, ploughed deep, rich yields.
+
+Aha: the exercise for the reader is to place the parens correctly.
+Might take me a while to solve this puzzle.
+
--- a/src/tests/testdir/cur/1220863087.12663_5.mindcrime:2,S
+++ b/src/tests/testdir/cur/1220863087.12663_5.mindcrime:2,S
@ -0,0 +1,84 @@
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+Date: Mon, 4 Aug 2008 11:40:49 +0200
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+Subject: [sqlite-dev] VM optimization inside sqlite3VdbeExec
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+
+Inside sqlite3VdbeExec there is a very big switch statement.
+In order to increase performance with few modifications to the  
+original code, why not use this technique ?
+http://docs.freebsd.org/info/gcc/gcc.info.Labels_as_Values.html
+
+With a properly defined "instructions" array, instead of the switch  
+statement you can use something like:
+goto * instructions[pOp->opcode];
+---
+Marco Bambini
+http://www.sqlabs.net
+http://www.sqlabs.net/blog/
+http://www.sqlabs.net/realsqlserver/
+
+
+
+_______________________________________________
+sqlite-dev mailing list
+sqlite-dev@sqlite.org
+http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-dev
+
--- a/src/tests/testdir/cur/1220863087.12663_7.mindcrime:2,RS
+++ b/src/tests/testdir/cur/1220863087.12663_7.mindcrime:2,RS
@ -0,0 +1,138 @@
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+Subject: Re: [sqlite-dev] VM optimization inside sqlite3VdbeExec
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+
+Marco Bambini wrote:
+> Inside sqlite3VdbeExec there is a very big switch statement.
+> In order to increase performance with few modifications to the  
+> original code, why not use this technique ?
+> http://docs.freebsd.org/info/gcc/gcc.info.Labels_as_Values.html
+>
+> With a properly defined "instructions" array, instead of the switch  
+> statement you can use something like:
+> goto * instructions[pOp->opcode];
+> ---
+> Marco Bambini
+> http://www.sqlabs.net
+> http://www.sqlabs.net/blog/
+> http://www.sqlabs.net/realsqlserver/
+>
+>
+>
+> _______________________________________________
+> sqlite-dev mailing list
+> sqlite-dev@sqlite.org
+> http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-dev
+>   
+All the world's not a VAX.  This technique is GCC-specific. The SQLite 
+source must be as portable as possible thus tying it to a specific 
+compiler is out of the question. While one could conceivably use some 
+preprocessor magic to provide alternate implementations, that would be 
+impractical considering the sheer size of the code affected.
+On the other hand - perhaps you could benchmark the change and provide 
+some data on whether this actually improves performance?
+
+
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+_______________________________________________
+sqlite-dev mailing list
+sqlite-dev@sqlite.org
+http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-dev
+
+--------------000207070200050102060301--
+
--- a/src/tests/testdir/new/1220863087.12663_21.mindcrime
+++ b/src/tests/testdir/new/1220863087.12663_21.mindcrime
@ -0,0 +1,111 @@
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+Subject: Re: basic question: going back to dired
+X-BeenThere: help-gnu-emacs@gnu.org
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+List-Id: Users list for the GNU Emacs text editor <help-gnu-emacs.gnu.org>
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+ <mailto:help-gnu-emacs-request@gnu.org?subject=unsubscribe>
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+
+On Thursday 31 July 2008, Xah wrote:
+> what's the logic of =E2=80=9COK=E2=80=9D?
+
+=46or all I know, it comes from "0 Knock-outs" (from USA civil war times,
+IIRC), i.e., all went really well.
+
+But this is really off-topic.
+=2D-=20
+Juanma
+
+"Having a smoking section in a restaurant is like
+ having a peeing section in a swimming pool."
+       -- Edward Burr
+
+
+
+
+
--- a/src/tests/testdir/new/1220863087.12663_23.mindcrime
+++ b/src/tests/testdir/new/1220863087.12663_23.mindcrime
@ -0,0 +1,105 @@
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+Date: Wed, 6 Aug 2008 22:57:41 +0200
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+Subject: Re: basic question: going back to dired
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+On Wed, Aug 6, 2008 at 22:38, Juanma <juanma_bellon@yahoo.es> wrote:
+
+> For all I know, it comes from "0 Knock-outs" (from USA civil war times,
+> IIRC), i.e., all went really well.
+
+See http://en.wikipedia.org/wiki/Okay#Etymology
+
+"0 knock-outs" is among the "Improbable or refuted etymologies".
+
+   Juanma
+
+
--- a/src/tests/testdir/new/1220863087.12663_25.mindcrime
+++ b/src/tests/testdir/new/1220863087.12663_25.mindcrime
@ -0,0 +1,98 @@
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+Path: news.stanford.edu!headwall.stanford.edu!newshub.sdsu.edu!news-out.readnews.com!news-xxxfer.readnews.com!panix!not-for-mail
+From: anon@example.com
+Newsgroups: gnu.emacs.help
+Date: Fri, 08 Aug 2008 10:07:30 -0400
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+To: help-gnu-emacs@gnu.org
+Subject: Re: basic question: going back to dired
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+
+I seem to remember from my early school days it was a campaign slogan
+for someone nick-named Kinderhook that went something like
+
+Old Kinderhook is OK
+
+- Chris
+
+"Juanma Barranquero" <lekktu@gmail.com> writes:
+
+> On Wed, Aug 6, 2008 at 22:38, Juanma <juanma_bellon@yahoo.es> wrote:
+>
+>> For all I know, it comes from "0 Knock-outs" (from USA civil war times,
+>> IIRC), i.e., all went really well.
+>
+> See http://en.wikipedia.org/wiki/Okay#Etymology
+>
+> "0 knock-outs" is among the "Improbable or refuted etymologies".
+>
+>    Juanma
+>
+>
+
+-- 
+     (.   .)
+  =ooO=(_)=Ooo=====================================
+  Chris McMahan | first_initiallastname@one.dot.net
+  =================================================
+
--- a/src/tests/testdir/new/1220863087.12663_9.mindcrime
+++ b/src/tests/testdir/new/1220863087.12663_9.mindcrime
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+Thread-Topic: [sqlite-dev] VM optimization inside sqlite3VdbeExec
+Thread-Index: Acj2FjkWvteFtLHTTYeVz4ES7E2ggAAGRxeI
+References: <83B5AF40-DBFA-4578-A043-04C80276E195@sqlabs.net>
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+Subject: Re: [sqlite-dev] VM optimization inside sqlite3VdbeExec
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+
+------_=_NextPart_001_01C8F630.0FC2EC1E
+Content-Type: text/plain;
+	charset="iso-8859-1"
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+
+Actually, almost every C compiler will already do what you suggest: if =
+the range of case labels is compact, the switch will be compiled using a =
+jump table. Only if the range is limited and/or sparse other techniques =
+will be used, such as linear search and binary search.
+=20
+I'm pretty sure, if you perform the tests suggested by Mihai, that you =
+will find zero performance difference, neither better, nor worse.
+=20
+Paul
+=20
+________________________________
+
+From: anon@example.com
+Sent: Mon 8/4/2008 11:40 AM
+To: sqlite-dev@sqlite.org
+Subject: [sqlite-dev] VM optimization inside sqlite3VdbeExec
+
+
+
+Inside sqlite3VdbeExec there is a very big switch statement.
+In order to increase performance with few modifications to the=20
+original code, why not use this technique ?
+http://docs.freebsd.org/info/gcc/gcc.info.Labels_as_Values.html =
+<http://docs.freebsd.org/info/gcc/gcc.info.Labels_as_Values.html>=20
+
+With a properly defined "instructions" array, instead of the switch=20
+statement you can use something like:
+goto * instructions[pOp->opcode];
+---
+Marco Bambini
+http://www.sqlabs.net <http://www.sqlabs.net/>=20
+http://www.sqlabs.net/blog/ <http://www.sqlabs.net/blog/>=20
+http://www.sqlabs.net/realsqlserver/ =
+<http://www.sqlabs.net/realsqlserver/>=20
+
+
+
+_______________________________________________
+sqlite-dev mailing list
+sqlite-dev@sqlite.org
+http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-dev =
+<http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-dev>=20
+
+
+
+------_=_NextPart_001_01C8F630.0FC2EC1E
+Content-Type: text/html;
+	charset="iso-8859-1"
+Content-Transfer-Encoding: quoted-printable
+
+<HTML dir=3Dltr><HEAD><TITLE>[sqlite-dev] VM optimization inside =
+sqlite3VdbeExec</TITLE>=0A=
+<META http-equiv=3DContent-Type content=3D"text/html; charset=3Dunicode">=0A=
+<META content=3D"MSHTML 6.00.2715.400" name=3DGENERATOR></HEAD>=0A=
+<BODY>=0A=
+<DIV id=3DidOWAReplyText54900 dir=3Dltr>=0A=
+<DIV dir=3Dltr><FONT face=3DArial color=3D#000000 size=3D2>Actually, =
+almost every C compiler will already do what you suggest: if the range =
+of case labels is compact, the switch will be compiled using a jump =
+table. Only if the range is limited and/or sparse other techniques will =
+be used, such as linear search and binary search.</FONT></DIV>=0A=
+<DIV dir=3Dltr><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>=0A=
+<DIV dir=3Dltr><FONT face=3DArial size=3D2>I'm pretty sure, if you =
+perform the tests suggested by Mihai, that you will find zero =
+performance difference, neither better, nor worse.</FONT></DIV>=0A=
+<DIV dir=3Dltr><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>=0A=
+<DIV dir=3Dltr><FONT face=3DArial size=3D2>Paul</FONT></DIV>=0A=
+<DIV dir=3Dltr><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>=0A=
+<DIV dir=3Dltr><FONT face=3DArial size=3D2>=0A=
+<HR tabIndex=3D-1>=0A=
+</FONT></DIV>=0A=
+<DIV dir=3Dltr><FONT face=3DArial><FONT size=3D2><B>From:</B> =
+sqlite-dev-bounces@sqlite.org on behalf of Marco Bambini<BR><B>Sent:</B> =
+Mon 8/4/2008 11:40 AM<BR><B>To:</B> =
+sqlite-dev@sqlite.org<BR><B>Subject:</B> [sqlite-dev] VM optimization =
+inside sqlite3VdbeExec<BR><BR></FONT></FONT></DIV></DIV>=0A=
+<DIV>=0A=
+<P><FONT face=3DArial size=3D2>Inside sqlite3VdbeExec there is a very =
+big switch statement.<BR>In order to increase performance with few =
+modifications to the&nbsp;<BR>original code, why not use this technique =
+?<BR></FONT><A =
+href=3D"http://docs.freebsd.org/info/gcc/gcc.info.Labels_as_Values.html">=
+<FONT face=3DArial =
+size=3D2>http://docs.freebsd.org/info/gcc/gcc.info.Labels_as_Values.html<=
+/FONT></A><BR><BR><FONT face=3DArial size=3D2>With a properly defined =
+"instructions" array, instead of the switch&nbsp;<BR>statement you can =
+use something like:<BR>goto * =
+instructions[pOp-&gt;opcode];<BR>---<BR>Marco Bambini<BR></FONT><A =
+href=3D"http://www.sqlabs.net/"><FONT face=3DArial =
+size=3D2>http://www.sqlabs.net</FONT></A><BR><A =
+href=3D"http://www.sqlabs.net/blog/"><FONT face=3DArial =
+size=3D2>http://www.sqlabs.net/blog/</FONT></A><BR><A =
+href=3D"http://www.sqlabs.net/realsqlserver/"><FONT face=3DArial =
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