def test_ffi_new_allocator_4(self): ffi = FFI(backend=self.Backend()) py.test.raises(TypeError, ffi.new_allocator, free=lambda x: None) # def myalloc2(size): raise LookupError alloc2 = ffi.new_allocator(myalloc2) py.test.raises(LookupError, alloc2, "int[5]") # def myalloc3(size): return 42 alloc3 = ffi.new_allocator(myalloc3) e = py.test.raises(TypeError, alloc3, "int[5]") assert str(e.value) == "alloc() must return a cdata object (got int)" # def myalloc4(size): return ffi.cast("int", 42) alloc4 = ffi.new_allocator(myalloc4) e = py.test.raises(TypeError, alloc4, "int[5]") assert str(e.value) == "alloc() must return a cdata pointer, not 'int'" # def myalloc5(size): return ffi.NULL alloc5 = ffi.new_allocator(myalloc5) py.test.raises(MemoryError, alloc5, "int[5]")
def test_ffi_new_allocator_2(self): ffi = FFI(backend=self.Backend()) seen = [] def myalloc(size): seen.append(size) return ffi.new("char[]", b"X" * size) def myfree(raw): seen.append(raw) alloc1 = ffi.new_allocator(myalloc, myfree) alloc2 = ffi.new_allocator(alloc=myalloc, free=myfree, should_clear_after_alloc=False) p1 = alloc1("int[10]") p2 = alloc2("int[]", 10) assert seen == [40, 40] assert ffi.typeof(p1) == ffi.typeof("int[10]") assert ffi.sizeof(p1) == 40 assert ffi.typeof(p2) == ffi.typeof("int[]") assert ffi.sizeof(p2) == 40 assert p1[5] == 0 assert p2[6] == ord('X') * 0x01010101 raw1 = ffi.cast("char *", p1) raw2 = ffi.cast("char *", p2) del p1, p2 retries = 0 while len(seen) != 4: retries += 1 assert retries <= 5 import gc; gc.collect() assert seen == [40, 40, raw1, raw2] assert repr(seen[2]) == "<cdata 'char[]' owning 41 bytes>" assert repr(seen[3]) == "<cdata 'char[]' owning 41 bytes>"
def test_ffi_new_allocator_4(self): ffi = FFI(backend=self.Backend()) py.test.raises(TypeError, ffi.new_allocator, free=lambda x: None) # def myalloc2(size): raise LookupError alloc2 = ffi.new_allocator(myalloc2) py.test.raises(LookupError, alloc2, "int[5]") # def myalloc3(size): return 42 alloc3 = ffi.new_allocator(myalloc3) e = py.test.raises(TypeError, alloc3, "int[5]") assert str(e.value) == "alloc() must return a cdata object (got int)" # def myalloc4(size): return ffi.cast("int", 42) alloc4 = ffi.new_allocator(myalloc4) e = py.test.raises(TypeError, alloc4, "int[5]") assert str(e.value) == "alloc() must return a cdata pointer, not 'int'" # def myalloc5(size): return ffi.NULL alloc5 = ffi.new_allocator(myalloc5) py.test.raises(MemoryError, alloc5, "int[5]")
def test_ffi_new_allocator_2(self): ffi = FFI(backend=self.Backend()) seen = [] def myalloc(size): seen.append(size) return ffi.new("char[]", b"X" * size) def myfree(raw): seen.append(raw) alloc1 = ffi.new_allocator(myalloc, myfree) alloc2 = ffi.new_allocator(alloc=myalloc, free=myfree, should_clear_after_alloc=False) p1 = alloc1("int[10]") p2 = alloc2("int[]", 10) assert seen == [40, 40] assert ffi.typeof(p1) == ffi.typeof("int[10]") assert ffi.sizeof(p1) == 40 assert ffi.typeof(p2) == ffi.typeof("int[]") assert ffi.sizeof(p2) == 40 assert p1[5] == 0 assert p2[6] == ord('X') * 0x01010101 raw1 = ffi.cast("char *", p1) raw2 = ffi.cast("char *", p2) del p1, p2 retries = 0 while len(seen) != 4: retries += 1 assert retries <= 5 import gc; gc.collect() assert seen == [40, 40, raw1, raw2] assert repr(seen[2]) == "<cdata 'char[]' owning 41 bytes>" assert repr(seen[3]) == "<cdata 'char[]' owning 41 bytes>"
def test_ffi_new_allocator_3(self): ffi = FFI(backend=self.Backend()) seen = [] def myalloc(size): seen.append(size) return ffi.new("char[]", b"X" * size) alloc1 = ffi.new_allocator(myalloc) # no 'free' p1 = alloc1("int[10]") assert seen == [40] assert ffi.typeof(p1) == ffi.typeof("int[10]") assert ffi.sizeof(p1) == 40 assert p1[5] == 0
def test_ffi_new_allocator_3(self): ffi = FFI(backend=self.Backend()) seen = [] def myalloc(size): seen.append(size) return ffi.new("char[]", b"X" * size) alloc1 = ffi.new_allocator(myalloc) # no 'free' p1 = alloc1("int[10]") assert seen == [40] assert ffi.typeof(p1) == ffi.typeof("int[10]") assert ffi.sizeof(p1) == 40 assert p1[5] == 0