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m/b/paged: use correct fd for MAP_ANONYMOUS

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linux ignores the fd if you pass MAP_ANONYMOUS, but freebsd will return
with an error
This commit is contained in:
Danny Robson 2016-05-12 17:42:21 +10:00
parent 8142944139
commit 7d96d8dd2f
1 changed files with 4 additions and 4 deletions
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8
memory/buffer/paged.cpp
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@ -33,7 +33,7 @@ paged::paged (size_t bytes, size_t _window):
{
// reserve the address region with no access permissions
m_begin = reinterpret_cast<char*> (
mmap (nullptr, bytes, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0)
mmap (nullptr, bytes, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0)
);
if (m_begin == MAP_FAILED)
@ -44,7 +44,7 @@ paged::paged (size_t bytes, size_t _window):
if (MAP_FAILED == mmap (m_begin,
m_cursor - m_begin,
PROT_READ | PROT_WRITE,
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, 0, 0))
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0))
errno_error::throw_code ();
// record the nominal end address
@ -109,7 +109,7 @@ paged::commit (char *cursor)
cursor - m_cursor,
PROT_READ | PROT_WRITE,
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS,
0, 0))
-1, 0))
errno_error::throw_code ();
m_cursor = cursor;
@ -136,7 +136,7 @@ paged::release (char *desired)
m_end - desired,
PROT_NONE,
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS,
0, 0))
-1, 0))
errno_error::throw_code ();
m_cursor = desired;