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Original file line number | Diff line number | Diff line change |
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require 'ffi' | ||
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class GetProcessMem | ||
class Darwin | ||
extend FFI::Library | ||
ffi_lib 'c' | ||
attach_function :mach_task_self, [], :__darwin_mach_port_t | ||
attach_function :task_info, | ||
[ | ||
:__darwin_mach_port_t, | ||
:int, # return selector | ||
:pointer, #pointer to task info | ||
:pointer, #pointer to int (size of structure / bytes filled out) | ||
], | ||
:int | ||
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class IntPtr < FFI::Struct | ||
layout :value, :int | ||
end | ||
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class TaskInfo < FFI::Struct | ||
layout :suspend_count, :int32, | ||
:virtual_size, :uint64, | ||
:resident_size, :uint64, | ||
:user_time, :uint64, | ||
:system_time, :uint64, | ||
:policy, :int32 | ||
end | ||
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MACH_TASK_BASIC_INFO = 20 | ||
MACH_TASK_BASIC_INFO_COUNT = TaskInfo.size / FFI.type_size(:uint) | ||
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class << self | ||
def resident_size | ||
mach_task_info[:resident_size] | ||
end | ||
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private | ||
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def mach_task_info | ||
data = TaskInfo.new | ||
out_count = IntPtr.new | ||
out_count[:value] = MACH_TASK_BASIC_INFO_COUNT | ||
result = task_info(mach_task_self, MACH_TASK_BASIC_INFO, data, out_count) | ||
if result == 0 | ||
data | ||
else | ||
raise "task_info returned #{result}" | ||
end | ||
end | ||
end | ||
end | ||
end |