Mercurial > cpython-lru_cache-weakref

annotate Python/hypot.c @ 33940:dfd07b7be407 legacy-trunk

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
SF bug 1061968: threads: segfault or Py_FatalError at exit PyGILState_Ensure(): The fix in 2.4a3 for bug 1010677 reintroduced thread shutdown race bug 225673. Repaired by (once again) ensuring the GIL is held whenever deleting a thread state. Alas, there's no useful test case for this shy bug. Four years ago, only Guido could provoke it, on his box, and today only Armin can provoke it on his box. I've never been able to provoke it (but not for lack of trying!). This is a critical fix for 2.3.5 too, since the fix for 1010677 got backported there already and so also reintroduced 225673. I don't intend to backport this fix. For whoever (if anyone) does, there are other thread fixes in 2.4 that need backporting too, and I bet they need to happen first for this patch to apply cleanly.
author Tim Peters <tim.peters@gmail.com>
date Mon, 08 Nov 2004 04:30:21 +0000
parents 2dea40e40d9d
children 7bc4cc972b0b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4176
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
1 /* hypot() replacement */
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
2
18835
2dea40e40d9d Patch #411138: Rename config.h to pyconfig.h. Closes bug #231774.
Martin v. Löwis <martin@v.loewis.de>
parents: 13761
diff changeset
3 #include "pyconfig.h"
13761
59f8cedcf049 merge Include/my*.h into Include/pyport.h
Peter Schneider-Kamp <nowonder@nowonder.de>
parents: 13658
diff changeset
4 #include "pyport.h"
4176
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
5
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 4176
diff changeset
6 double hypot(double x, double y)
4176
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
7 {
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
8 double yx;
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
9
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
10 x = fabs(x);
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
11 y = fabs(y);
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
12 if (x < y) {
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
13 double temp = x;
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
14 x = y;
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
15 y = temp;
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
16 }
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
17 if (x == 0.)
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
18 return 0.;
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
19 else {
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
20 yx = y/x;
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
21 return x*sqrt(1.+yx*yx);
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
22 }
37d009b1bf45 *** empty log message ***
Guido van Rossum <guido@python.org>
parents:
diff changeset
23 }