[Boost-bugs] [Boost C++ Libraries] #10157: Unnecessary open/close in protected_stack_allocator.hpp

Subject: [Boost-bugs] [Boost C++ Libraries] #10157: Unnecessary open/close in protected_stack_allocator.hpp
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-06-27 02:15:33

#10157: Unnecessary open/close in protected_stack_allocator.hpp
---------------------------+--------------------------
 Reporter:  windoze.net@…  |      Owner:  olli
     Type:  Bugs           |     Status:  new
Milestone:  Boost 1.56.0   |  Component:  coroutine
  Version:  Boost 1.55.0   |   Severity:  Optimization
 Keywords:                 |
---------------------------+--------------------------
 boost/libs/coroutine/include/boost/coroutine/posix/protected_stack_allocator.hpp:55

 Not sure why you have to open /dev/zero to get a FD for mmap, AFAIK
 following line should just work on both OSX and Linux, no need to open any
 file:

 {{{
 void * limit = ::mmap( 0, size_, PROT_READ | PROT_WRITE, MAP_PRIVATE |
 MAP_ANONYMOUS, -1, 0);
 }}}

 I've tested on both OSX 10.9.4/10.10DP1 and Ubuntu Linux 14.04 without
 problem.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10157>
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