|
| From: | John W. Eaton |
| Subject: | [Octave-bug-tracker] [bug #44406] glps_renderer::draw uses static state variable, potential bug? |
| Date: | Mon, 02 Mar 2015 14:33:47 +0000 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Firefox/31.0 Iceweasel/31.2.0 |
Follow-up Comment #2, bug #44406 (project octave):
An unwind_protect object is just a C++ object that stores data and associated
actions. It doesn't suspend signal delivery.
The unwind_protect destructor will execute at the end of the enclosing scope,
then whatever actions have been attached to it will be performed at that time.
Interrupts ultimately cause a C++ exception to be thrown, so unwind_protect
destructor would be called in that case too.
The unwind_protect object in the scope that calls glps_renderer::draw doesn't
do anything about restoring the value of the static variable in_draw. It
looks to me like an unwind_protect object is needed there too.
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