sdl-ios-xcode: src/thread/pth/SDL

annotate src/thread/pth/SDL_sysmutex.c @ 2752:edd2839b36f7

http://sources.redhat.com/ml/newlib/2002/msg00230.html Stephen L Moshier wrote: > > pow(x,y) returns 0 when x is very close to -1.0 and y is very large. > The following test program prints > > pow(1.0000000000000002e+00 4.5035996273704970e+15) = 2.7182818284590455e+00 > pow(-1.0000000000000002e+00 4.5035996273704970e+15) =0.0000000000000000e+00 > pow(9.9999999999999978e-01 4.5035996273704970e+15) = 3.6787944117144222e-01 > pow(-9.9999999999999978e-01 4.5035996273704970e+15) = 0.0000000000000000e+00 > > which is incorrect for the negative arguments raised to an odd integer > power. > > ----- > double pow (double, double); > > int > main () > { > double x, y, z; > > x = 1.0 + pow (2.0, -52.0); > y = 1.0 + pow (2.0, 52.0); > z = pow (x, y); > printf ("pow(%.16e %.16e) = %.16e\n", x, y, z); > x = -x; > z = pow (x, y); > printf ("pow(%.16e %.16e) = %.16e\n", x, y, z); > x = 1.0 - pow (2.0, -52.0); > z = pow (x, y); > printf ("pow(%.16e %.16e) = %.16e\n", x, y, z); > x = -x; > z = pow (x, y); > printf ("pow(%.16e %.16e) = %.16e\n", x, y, z); > } > ----- > > Here is a patch for newlib/libm/math/epow.c: Patch checked in and duplicated for ef_pow.c. Thanks. -- Jeff J.

author	Sam Lantinga <slouken@libsdl.org>
date	Mon, 15 Sep 2008 04:31:30 +0000
parents	c121d94672cb
children	99210400e8b9

rev	line source
1402 d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	1 /*
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	2 SDL - Simple DirectMedia Layer
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	3 Copyright (C) 1997-2006 Sam Lantinga
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	4
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	5 This library is free software; you can redistribute it and/or
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	6 modify it under the terms of the GNU Lesser General Public
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	7 License as published by the Free Software Foundation; either
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	8 version 2.1 of the License, or (at your option) any later version.
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	9
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	10 This library is distributed in the hope that it will be useful,
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	11 but WITHOUT ANY WARRANTY; without even the implied warranty of
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	13 Lesser General Public License for more details.
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	14
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	15 You should have received a copy of the GNU Lesser General Public
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	16 License along with this library; if not, write to the Free Software
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	18
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	19 Sam Lantinga
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	20 slouken@libsdl.org
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	21 */
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	22 #include "SDL_config.h"
d910939febfa Use consistent identifiers for the various platforms we support. Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	23
329 1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	24 /*
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	25 * GNU pth mutexes
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	26 *
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	27 * Patrice Mandin
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	28 */
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	29
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	30 #include <pth.h>
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	31
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	32 #include "SDL_mutex.h"
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	33 #include "SDL_sysmutex_c.h"
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	34
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	35 /* Create a mutex */
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	36 SDL_mutex *
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	37 SDL_CreateMutex(void)
329 1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	38 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	39 SDL_mutex *mutex;
329 1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	40
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	41 /* Allocate mutex memory */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	42 mutex = (SDL_mutex ) SDL_malloc(sizeof(mutex));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	43 if (mutex) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	44 /* Create the mutex, with initial value signaled */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	45 if (!pth_mutex_init(&(mutex->mutexpth_p))) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	46 SDL_SetError("Couldn't create mutex");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	47 SDL_free(mutex);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	48 mutex = NULL;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	49 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	50 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	51 SDL_OutOfMemory();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	52 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	53 return (mutex);
329 1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	54 }
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	55
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	56 /* Free the mutex */
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	57 void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	58 SDL_DestroyMutex(SDL_mutex * mutex)
329 1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	59 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	60 if (mutex) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	61 SDL_free(mutex);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	62 }
329 1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	63 }
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	64
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	65 /* Lock the mutex */
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	66 int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	67 SDL_mutexP(SDL_mutex * mutex)
329 1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	68 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	69 if (mutex == NULL) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	70 SDL_SetError("Passed a NULL mutex");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	71 return -1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	72 }
329 1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	73
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	74 pth_mutex_acquire(&(mutex->mutexpth_p), FALSE, NULL);
329 1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	75
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	76 return (0);
329 1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	77 }
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	78
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	79 /* Unlock the mutex */
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	80 int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	81 SDL_mutexV(SDL_mutex * mutex)
329 1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	82 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	83 if (mutex == NULL) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	84 SDL_SetError("Passed a NULL mutex");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	85 return -1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	86 }
329 1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	87
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	88 pth_mutex_release(&(mutex->mutexpth_p));
1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	89
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	90 return (0);
329 1d74ddc90cb2 Patrice's fixes for GNU Pthread support Sam Lantinga <slouken@libsdl.org> parents: diff changeset	91 }
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	92
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	93 /* vi: set ts=4 sw=4 expandtab: */

Mercurial > sdl-ios-xcode

annotate src/thread/pth/SDL_sysmutex.c @ 2752:edd2839b36f7