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Showing 2 changed files with 11 additions and 6 deletions.
6 changes: 5 additions & 1 deletion src/fiber.cr
Original file line number Diff line number Diff line change
@@ -90,9 +90,13 @@ class Fiber
end

protected def self.allocate_stack
flags = LibC::MAP_PRIVATE | LibC::MAP_ANON
{% if flag?(:openbsd) && !flag?(:"openbsd6.2") %}
flags |= LibC::MAP_STACK
{% end %}
@@stack_pool.pop? || LibC.mmap(nil, Fiber::STACK_SIZE,
LibC::PROT_READ | LibC::PROT_WRITE,
LibC::MAP_PRIVATE | LibC::MAP_ANON,
flags,
-1, 0
).tap do |pointer|
raise Errno.new("Cannot allocate new fiber stack") if pointer == LibC::MAP_FAILED
11 changes: 6 additions & 5 deletions src/lib_c/amd64-unknown-openbsd/c/sys/mman.cr
Original file line number Diff line number Diff line change
@@ -11,11 +11,12 @@ lib LibC
MAP_ANON = 0x1000
MAP_ANONYMOUS = LibC::MAP_ANON
MAP_FAILED = Pointer(Void).new(-1)
POSIX_MADV_DONTNEED = 4
POSIX_MADV_NORMAL = 0
POSIX_MADV_RANDOM = 1
POSIX_MADV_SEQUENTIAL = 2
POSIX_MADV_WILLNEED = 3
MAP_STACK = 0x4000
POSIX_MADV_DONTNEED = 4
POSIX_MADV_NORMAL = 0
POSIX_MADV_RANDOM = 1
POSIX_MADV_SEQUENTIAL = 2
POSIX_MADV_WILLNEED = 3
MADV_DONTNEED = LibC::POSIX_MADV_DONTNEED
MADV_NORMAL = LibC::POSIX_MADV_NORMAL
MADV_RANDOM = LibC::POSIX_MADV_RANDOM

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