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comparison python/pydc/examples/callback.py @ 56:16151547265e

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made callback example python 2 compatible, and added some randomness to numbers to sort
author Tassilo Philipp
date Tue, 02 Feb 2021 21:07:41 +0100
parents 918dab7a6606
children
comparison
equal deleted inserted replaced
55:2e8a56976bf8 56:16151547265e
7 # data to compare, further adding to the overhead 7 # data to compare, further adding to the overhead
8 8
9 from pydc import * 9 from pydc import *
10 import sys 10 import sys
11 import platform 11 import platform
12 import random
12 import struct 13 import struct
13 14
14 if sys.platform == "win32": 15 if sys.platform == "win32":
15 libc = load("msvcrt") 16 libc = load("msvcrt")
16 elif sys.platform == "darwin": 17 elif sys.platform == "darwin":
28 fp_qsort = find(libc,"qsort") # void qsort(void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *)); 29 fp_qsort = find(libc,"qsort") # void qsort(void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *));
29 fp_memcpy = find(libc,"memcpy") # void * memcpy(void *dst, const void *src, size_t len); 30 fp_memcpy = find(libc,"memcpy") # void * memcpy(void *dst, const void *src, size_t len);
30 31
31 32
32 33
33 nums = bytearray(struct.pack("i"*8, 12, 3, 5, 99, 3, -9, -9, 0)) 34 n = 8
34 es = int(len(nums)/8) # element size 35 nums = bytearray(struct.pack("i"*n, *[random.randrange (-10, 50) for i in range (n)]))
36 es = int(len(nums)/n) # element size
35 37
36 38
37 def compar(a, b): 39 def compar(a, b):
38 ba = bytearray(es) 40 ba = bytearray(es)
39 call(fp_memcpy,"ppi)p", ba, a, es) 41 call(fp_memcpy,"ppi)p", ba, a, es)
44 46
45 cb = new_callback("pp)i", compar) 47 cb = new_callback("pp)i", compar)
46 48
47 # -------- 49 # --------
48 50
49 print(*struct.unpack("i"*8, nums)) 51 print('%d '*n % struct.unpack("i"*n, nums))
50 52
51 print('... qsort ...') 53 print('... qsort ...')
52 call(fp_qsort,"piip)v", nums, 8, es, cb) 54 call(fp_qsort,"piip)v", nums, n, es, cb)
53 55
54 print(*struct.unpack("i"*8, nums)) 56 print('%d '*n % struct.unpack("i"*n, nums))
55 57
56 58
57 free_callback(cb) 59 free_callback(cb)
58 60