Pike 8.0.460 beta candidate:
https://pike.lysator.liu.se/pub/pike/beta/8.0.460/Pike-v8.0.460.tar.gz
Other builds:
https://pike.lysator.liu.se/pub/pike/beta/8.0.460/Pike-v8.0.460-Darwin-15.4.0-x86_64-macports
https://pike.lysator.liu.se/pub/pike/beta/8.0.460/Pike-v8.0.460-win32-oldlibs.msi
This is not a release candidate. There are some changes without
CHANGES and I'm not quite comfortable with the namespace the
Debug.Peek functionality is living in.
Changes since Pike 8.0.438 (release 9)
----------------------------------------------------------------------
New Features
------------
o Concurrent
The Concurrent module simplifies asynchronous code by synchronizing
events in different ways. As an example the connect() function shown
below will respond with a Concurrent.Future object that at some point
will represent either a connected socket or a failure.
Concurrent.Future connect(string host, int port)
{
Stdio.File con = Stdio.File();
Concurrent.Promise p = Concurrent.Promise();
if( !con->async_connect(host, port, lambda(int success)
{
if(success)
p->success(con);
else
p->failure("Failed to connect to "+host+":"+port+"\n");
}))
{
p->failure("Failed to open socket.\n");
}
return p->future();
}
The returned future can then be used in various ways.
// On success, call make_request(con, query). On failure call
// werror(msg).
connect(host, port)
->on_failure(werror)
->on_success(make_request, query);
// On success, call make_request(con, query1) followed by
// make_request(resp, query2), where resp is the return value from
// make_reqest.
connect(host, port)
->then(make_request, werror, query1)
->then(make_request, werror, query2);
// Call bridge_ports(con1, con2) when both connections are
// established.
Concurrent.all(connect(host1, port1), connect(host2, port2))
->then(bridge_ports, failure);
// Call make_request(con) once either of the connections are
// established.
Concurrent.race(connect(host1, port1), connect(host2, port2))
->then(make_requet, query);
o Filesystem.Monitor
- Changed the polling heuristic.
This is intended to reduce poll (and notification) delays in
some circumstances.
- Improved robostness of adjust_monitor().
- Removed some dead and obsolete code.
- Scan accelerated monitors too.
Both the Inotify and FSEvents APIs claim that they support
notifications on eg network file systems, and while they will
succeed in notifying on changes performed by the local host
on such file systems, they will not on changes performed by
other hosts. To avoid missing such changes these monitors
need to be actively scanned too.
o Sql.pgsql
Sped up BEGIN/COMMIT statements.
Preserve the initial error message in case of multiple error messages
during the same transaction.
Flush out unseen error messages upon connection close to stderr.
o Debug.Peek
Allows for interactive debugging and live data structure inspection
in both single- and multi-threaded programs.
Example:
In the program you'd like to inspect, insert the following one-liner:
Debug.Peek("/tmp/test.pike");
Then start the program and keep it running.
Next you create a /tmp/test.pike with the following content:
void create() {
werror("Only once per modification of test.pike\n");
}
int main() {
werror("This will run every iteration\n");
werror("By returning 1 here, we disable the stacktrace dumps\n");
return 0;
}
void destroy() {
werror("destroy() runs just as often as create()\n");
}
Whenever you edit /tmp/test.pike, it will automatically reload
the file.
Bug fixes
---------
o Search
Fixed a race condition when updating the database.
o Parser.HTML
Fixed a condition where Pike would run out of stack space for large
documents.
o ADT.Heap
Fixed heap corruption when the same object is pushed more than
once. It will now be considered as calling adjust().
o Inotify
Addressed an issue where the backend might be stuck in pending
indefinitely.
o FSEvents
EventStreamMonitor now works with other backends.
o Standards.BSON
Fixed incorrect encoding/decoding of Binary data.
o Stdio.Buffer
Fixed a crash when attempting to create a rewind key on a buffer
returned by read_buffer().
o mappings
Fixed an off by one error in random(mapping) that randomly caused
values of type PIKE_T_FREE from the freelist to be exposed to Pike.
o Sql.pgsql
Closed a prepared-statement-cache race when the same statement
is offered multiple times before it finalises the cache entry.
Fix sync errors with the database in case of multiple running
statements on a single connection that generate multiple errors.
--
Peter Bortas
