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-rw-r--r--common/threads/driver.cxx94
1 files changed, 56 insertions, 38 deletions
diff --git a/common/threads/driver.cxx b/common/threads/driver.cxx
index bf12707..2bc1897 100644
--- a/common/threads/driver.cxx
+++ b/common/threads/driver.cxx
@@ -31,9 +31,9 @@ using namespace std;
using namespace odb::core;
namespace details = odb::details;
-const unsigned long thread_count = 32;
-const unsigned long iteration_count = 50;
-const unsigned long sub_iteration_count = 20;
+const unsigned long thread_count = 24;
+const unsigned long iteration_count = 30;
+const unsigned long sub_iteration_count = 40;
struct task
{
@@ -51,21 +51,26 @@ struct task
{
unsigned long id ((n_ * iteration_count + i) * 3);
+ object o1 (id, "first object");
+ object o2 (id + 1, "second object");
+ object o3 (id + 2, "third object");
+
+ // The following transactions may lead to deadlocks.
+ //
+ while (true)
{
- object o1 (id, "first object");
- object o2 (id + 1, "second object");
- object o3 (id + 2, "third object");
-
- transaction t (db_.begin ());
- db_.persist (o1);
- db_.persist (o2);
- db_.persist (o3);
- t.commit ();
+ try
+ {
+ transaction t (db_.begin ());
+ db_.persist (o1);
+ db_.persist (o2);
+ db_.persist (o3);
+ t.commit ();
+ break;
+ }
+ catch (const deadlock&) {}
}
- // The following transaction may lead to a deadlock in some database
- // implementations (read to write lock upgrade).
- //
while (true)
{
try
@@ -105,37 +110,50 @@ struct task
typedef odb::prepared_query<object> prep_query;
typedef odb::result<object> result;
- transaction t (db_.begin ());
-
- prep_query pq (db_.lookup_query<object> ("object-query"));
-
- if (!pq)
+ while (true)
{
- pq = db_.prepare_query<object> (
- "object-query", query::str == "another value");
- db_.cache_query (pq);
- }
-
- result r (pq.execute (false));
-
- bool found (false);
- for (result::iterator i (r.begin ()); i != r.end (); ++i)
- {
- if (i->id_ == id)
+ try
{
- found = true;
+ transaction t (db_.begin ());
+
+ prep_query pq (db_.lookup_query<object> ("object-query"));
+
+ if (!pq)
+ {
+ pq = db_.prepare_query<object> (
+ "object-query", query::str == "another value");
+ db_.cache_query (pq);
+ }
+
+ result r (pq.execute (false));
+
+ bool found (false);
+ for (result::iterator i (r.begin ()); i != r.end (); ++i)
+ {
+ if (i->id_ == id)
+ {
+ found = true;
+ break;
+ }
+ }
+ assert (found);
+ t.commit ();
break;
}
+ catch (const deadlock&) {}
}
- assert (found);
-
- t.commit ();
}
+ while (true)
{
- transaction t (db_.begin ());
- db_.erase<object> (id);
- t.commit ();
+ try
+ {
+ transaction t (db_.begin ());
+ db_.erase<object> (id);
+ t.commit ();
+ break;
+ }
+ catch (const deadlock&) {}
}
}
}