[PATCH] python: Properly initialize before trying to create disasm

[Anders Waldenborg]

Hi indygreg, gottesmm,

http://llvm-reviews.chandlerc.com/D1879

Files:
  bindings/python/llvm/disassembler.py

Index: bindings/python/llvm/disassembler.py
===================================================================
--- bindings/python/llvm/disassembler.py
+++ bindings/python/llvm/disassembler.py
@@ -33,6 +33,16 @@
 # Constants for set_options
 Option_UseMarkup = 1
 
+_initialized = False
+def _ensure_initialized():
+    global _initialized
+    if not _initialized:
+        lib.LLVMInitializeAllTargetInfos()
+        lib.LLVMInitializeAllTargetMCs()
+        lib.LLVMInitializeAllDisassemblers()
+        _initialized = True
+
+
 class Disassembler(LLVMObject):
     """Represents a disassembler instance.
 
@@ -47,6 +57,9 @@
         The triple argument is the triple to create the disassembler for. This
         is something like 'i386-apple-darwin9'.
         """
+
+        _ensure_initialized()
+
         ptr = lib.LLVMCreateDisasm(c_char_p(triple), c_void_p(None), c_int(0),
                 callbacks['op_info'](0), callbacks['symbol_lookup'](0))
         if not ptr.contents:
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