projects / people / shoehn / ipfire.org.git / blame
| Commit | Line | Data |
|---|---|---|
| 879aa787 MT |
1 | # Written by Bram Cohen |
| 2 | # see LICENSE.txt for license information | |
| 3 | ||
| 4 | from select import select, error | |
| 5 | from time import sleep | |
| 6 | from types import IntType | |
| 7 | from bisect import bisect | |
| 8 | POLLIN = 1 | |
| 9 | POLLOUT = 2 | |
| 10 | POLLERR = 8 | |
| 11 | POLLHUP = 16 | |
| 12 | ||
| 13 | class poll: | |
| 14 | def __init__(self): | |
| 15 | self.rlist = [] | |
| 16 | self.wlist = [] | |
| 17 | ||
| 18 | def register(self, f, t): | |
| 19 | if type(f) != IntType: | |
| 20 | f = f.fileno() | |
| 21 | if (t & POLLIN): | |
| 22 | insert(self.rlist, f) | |
| 23 | else: | |
| 24 | remove(self.rlist, f) | |
| 25 | if (t & POLLOUT): | |
| 26 | insert(self.wlist, f) | |
| 27 | else: | |
| 28 | remove(self.wlist, f) | |
| 29 | ||
| 30 | def unregister(self, f): | |
| 31 | if type(f) != IntType: | |
| 32 | f = f.fileno() | |
| 33 | remove(self.rlist, f) | |
| 34 | remove(self.wlist, f) | |
| 35 | ||
| 36 | def poll(self, timeout = None): | |
| 37 | if self.rlist or self.wlist: | |
| 38 | try: | |
| 39 | r, w, e = select(self.rlist, self.wlist, [], timeout) | |
| 40 | except ValueError: | |
| 41 | return None | |
| 42 | else: | |
| 43 | sleep(timeout) | |
| 44 | return [] | |
| 45 | result = [] | |
| 46 | for s in r: | |
| 47 | result.append((s, POLLIN)) | |
| 48 | for s in w: | |
| 49 | result.append((s, POLLOUT)) | |
| 50 | return result | |
| 51 | ||
| 52 | def remove(list, item): | |
| 53 | i = bisect(list, item) | |
| 54 | if i > 0 and list[i-1] == item: | |
| 55 | del list[i-1] | |
| 56 | ||
| 57 | def insert(list, item): | |
| 58 | i = bisect(list, item) | |
| 59 | if i == 0 or list[i-1] != item: | |
| 60 | list.insert(i, item) | |
| 61 | ||
| 62 | def test_remove(): | |
| 63 | x = [2, 4, 6] | |
| 64 | remove(x, 2) | |
| 65 | assert x == [4, 6] | |
| 66 | x = [2, 4, 6] | |
| 67 | remove(x, 4) | |
| 68 | assert x == [2, 6] | |
| 69 | x = [2, 4, 6] | |
| 70 | remove(x, 6) | |
| 71 | assert x == [2, 4] | |
| 72 | x = [2, 4, 6] | |
| 73 | remove(x, 5) | |
| 74 | assert x == [2, 4, 6] | |
| 75 | x = [2, 4, 6] | |
| 76 | remove(x, 1) | |
| 77 | assert x == [2, 4, 6] | |
| 78 | x = [2, 4, 6] | |
| 79 | remove(x, 7) | |
| 80 | assert x == [2, 4, 6] | |
| 81 | x = [2, 4, 6] | |
| 82 | remove(x, 5) | |
| 83 | assert x == [2, 4, 6] | |
| 84 | x = [] | |
| 85 | remove(x, 3) | |
| 86 | assert x == [] | |
| 87 | ||
| 88 | def test_insert(): | |
| 89 | x = [2, 4] | |
| 90 | insert(x, 1) | |
| 91 | assert x == [1, 2, 4] | |
| 92 | x = [2, 4] | |
| 93 | insert(x, 3) | |
| 94 | assert x == [2, 3, 4] | |
| 95 | x = [2, 4] | |
| 96 | insert(x, 5) | |
| 97 | assert x == [2, 4, 5] | |
| 98 | x = [2, 4] | |
| 99 | insert(x, 2) | |
| 100 | assert x == [2, 4] | |
| 101 | x = [2, 4] | |
| 102 | insert(x, 4) | |
| 103 | assert x == [2, 4] | |
| 104 | x = [2, 3, 4] | |
| 105 | insert(x, 3) | |
| 106 | assert x == [2, 3, 4] | |
| 107 | x = [] | |
| 108 | insert(x, 3) | |
| 109 | assert x == [3] |