Mercurial > cpython-lru_cache-weakref

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents b36cb4602e21
children
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1
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2 /*
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3 * Initialization.
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4 */
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5 static void
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6 PyThread__init_thread(void)
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7 {
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8 }
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10 /*
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11 * Thread support.
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12 */
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13 long
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14 PyThread_start_new_thread(void (*func)(void *), void *arg)
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15 {
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16 int success = 0; /* init not needed when SOLARIS_THREADS and */
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17 /* C_THREADS implemented properly */
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19 dprintf(("PyThread_start_new_thread called\n"));
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20 if (!initialized)
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21 PyThread_init_thread();
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22 return success < 0 ? -1 : 0;
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23 }
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25 long
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26 PyThread_get_thread_ident(void)
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27 {
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28 if (!initialized)
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29 PyThread_init_thread();
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30 }
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32 void
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33 PyThread_exit_thread(void)
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34 {
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35 dprintf(("PyThread_exit_thread called\n"));
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36 if (!initialized)
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37 exit(0);
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38 }
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40 /*
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41 * Lock support.
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42 */
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43 PyThread_type_lock
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44 PyThread_allocate_lock(void)
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45 {
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47 dprintf(("PyThread_allocate_lock called\n"));
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48 if (!initialized)
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49 PyThread_init_thread();
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51 dprintf(("PyThread_allocate_lock() -> %p\n", lock));
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52 return (PyThread_type_lock) lock;
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53 }
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55 void
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56 PyThread_free_lock(PyThread_type_lock lock)
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57 {
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58 dprintf(("PyThread_free_lock(%p) called\n", lock));
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59 }
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61 int
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62 PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
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63 {
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64 int success;
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66 dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
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67 dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
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68 return success;
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69 }
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71 void
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72 PyThread_release_lock(PyThread_type_lock lock)
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73 {
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74 dprintf(("PyThread_release_lock(%p) called\n", lock));
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75 }