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m/b/circular: use correct fd for MAP_ANONYMOUS

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This commit is contained in:
Danny Robson 2016-05-13 13:56:53 +10:00
parent 1bfe4867ad
commit 8dc4abb69c
1 changed files with 2 additions and 2 deletions
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4
memory/buffer/circular.cpp
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@ -90,7 +90,7 @@ circular::circular (size_t bytes)
// pre-allocate a sufficiently large virtual memory block. it doesn't // pre-allocate a sufficiently large virtual memory block. it doesn't
// matter much what flags we use because we'll just be overwriting it // matter much what flags we use because we'll just be overwriting it
// shortly. // shortly.
m_begin = reinterpret_cast<char*> (mmap (nullptr, bytes * 2, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0)); m_begin = reinterpret_cast<char*> (mmap (nullptr, bytes * 2, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0));
if (MAP_FAILED == m_begin) if (MAP_FAILED == m_begin)
errno_error::throw_code (); errno_error::throw_code ();
@ -143,4 +143,4 @@ size_t
circular::size (void) const circular::size (void) const
{ {
return m_end - m_begin; return m_end - m_begin;
} }