2012-03-09 09:07:35 +00:00
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#===- core.py - Python LLVM Bindings -------------------------*- python -*--===#
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#
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# The LLVM Compiler Infrastructure
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#
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# This file is distributed under the University of Illinois Open Source
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# License. See LICENSE.TXT for details.
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#
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#===------------------------------------------------------------------------===#
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2012-03-09 18:56:33 +00:00
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from .common import LLVMObject
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2012-03-09 09:07:35 +00:00
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from .common import get_library
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from ctypes import POINTER
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from ctypes import byref
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from ctypes import c_char_p
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from ctypes import c_void_p
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__all__ = [
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"lib",
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"MemoryBufferRef",
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]
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lib = get_library()
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class MemoryBuffer(object):
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"""Represents an opaque memory buffer."""
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def __init__(self, filename=None):
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"""Create a new memory buffer.
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Currently, we support creating from the contents of a file at the
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specified filename.
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"""
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if filename is None:
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raise Exception("filename argument must be defined")
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2012-03-09 18:56:33 +00:00
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memory = LLVMObject()
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2012-03-09 09:07:35 +00:00
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out = c_char_p(None)
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result = lib.LLVMCreateMemoryBufferWithContentsOfFile(filename,
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byref(memory), byref(out))
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if result:
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raise Exception("Could not create memory buffer: %s" % out.value)
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self._memory = memory
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2012-03-09 18:56:33 +00:00
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self._as_parameter_ = self._memory
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self._owned = True
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2012-03-09 09:07:35 +00:00
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def __del__(self):
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2012-03-09 18:56:33 +00:00
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if self._owned:
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lib.LLVMDisposeMemoryBuffer(self._memory)
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2012-03-09 09:07:35 +00:00
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def from_param(self):
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2012-03-09 18:56:33 +00:00
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return self._as_parameter_
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def release_ownership(self):
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self._owned = False
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2012-03-09 09:07:35 +00:00
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def register_library(library):
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library.LLVMCreateMemoryBufferWithContentsOfFile.argtypes = [c_char_p,
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POINTER(LLVMObject), POINTER(c_char_p)]
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2012-03-09 09:07:35 +00:00
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library.LLVMCreateMemoryBufferWithContentsOfFile.restype = bool
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library.LLVMDisposeMemoryBuffer.argtypes = [c_void_p]
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register_library(lib)
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