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mcu: Be careful to free memory allocated in C code

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Free steppersync, stepcompress, and commandqueue objects.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2016-11-30 01:58:45 -05:00
parent 55fc11ff02
commit 7cb71df02c
6 changed files with 86 additions and 23 deletions
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10
klippy/mcu.py
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@ -42,9 +42,10 @@ class MCU_stepper:
self._reset_cmd = mcu.lookup_command(
"reset_step_clock oid=%c clock=%u")
ffi_main, self.ffi_lib = chelper.get_ffi()
self._stepqueue = self.ffi_lib.stepcompress_alloc(
self._stepqueue = ffi_main.gc(self.ffi_lib.stepcompress_alloc(
max_error, self._step_cmd.msgid
, self._dir_cmd.msgid, self._invert_dir, self._oid)
, self._dir_cmd.msgid, self._invert_dir, self._oid),
self.ffi_lib.stepcompress_free)
self.print_to_mcu_time = mcu.print_to_mcu_time
def get_oid(self):
return self._oid
@ -356,6 +357,9 @@ class MCU:
self.get_print_buffer_time = dummy_get_print_buffer_time
def disconnect(self):
self.serial.disconnect()
if self._steppersync is not None:
self.ffi_lib.steppersync_free(self._steppersync)
self._steppersync = None
def stats(self, eventtime):
stats = self.serial.stats(eventtime)
stats += " mcu_task_avg=%.06f mcu_task_stddev=%.06f" % (
@ -484,3 +488,5 @@ class MCU:
mcu_time = print_time + self._print_start_time
clock = int(mcu_time * self._mcu_freq)
self.ffi_lib.steppersync_flush(self._steppersync, clock)
def __del__(self):
self.disconnect()