Tuesday, June 28, 2011

Thursday, June 16, 2011

Tuesday, June 14, 2011

Self-documenting code


enum MessageSendFlags {
    // Whether this message should be dispatched when waiting for a sync reply.
    // This is the default for synchronous messages.
    DispatchMessageEvenWhenWaitingForSyncReply = 1 << 0,


virtual Vector windowsToReceiveSentMessagesWhileWaitingForSyncReply() = 0;


void setOnlySendMessagesAsDispatchWhenWaitingForSyncReplyWhenProcessingSuchAMessage(bool);
void setShouldExitOnSyncMessageSendFailure(bool shouldExitOnSyncMessageSendFailure);


bool m_onlySendMessagesAsDispatchWhenWaitingForSyncReplyWhenProcessingSuchAMessage;
bool m_shouldExitOnSyncMessageSendFailure;
DidCloseOnConnectionWorkQueueCallback m_didCloseOnConnectionWorkQueueCallback;

and so on :-)

Thanks to Anatoly Vorobey for pointing.

Tuesday, June 7, 2011

GNU C Family Extensions

Some time ago I met confusing C ternary operator usage

return timeout ?: 1;

It turned out to be a GNU "Conditionals with Omitted Operands

C extension. The list of "Extensions to the C Language Family" can be found here.

This page is worth reading. For example, getting
the address of a label defined in the current function (or a containing
function) with the unary operator `&&'. The value has type void *. This value
is a constant and can be used wherever a constant of that type is valid.
For example:
     void *ptr;
     /* ... */
     ptr = &&foo;
To use these values, you need to be able to jump to one. This is done with
the computed goto statement, goto *exp;.
For example,
     goto *ptr;