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Date: Sat, 27 Nov 2004 13:35:43 +0100 From: "Martin Bickel" Subject: [SDL] Patch: fixing uninitilized palette while running Valgrind over my application I found the following problem in SDL: The function MapNto1 allocates SDL_Color colors[256] but does not initialize it. SDL_DitherColors is then called which initialized the r, g and b component, but not the 'unused' component of each color. When Map1to1 is called from MapNto1, it runs a memcmp on the colors, which also evaluates the unused component and therefor returns differences much more often than necessary. So the 'unused' component of SDL_Color should be initialized. This patch does this by calling memset for the whole array in MapNto1 .
author Sam Lantinga <slouken@libsdl.org>
date Tue, 30 Nov 2004 14:28:20 +0000
parents e5bc29de3f0a
children 546f7c1eb755
rev   line source
181
e5bc29de3f0a Updated from the SDL Documentation Project
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1 .TH "SDL_DestroySemaphore" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference"
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2 .SH "NAME"
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3 SDL_DestroySemaphore\- Destroys a semaphore that was created by \fISDL_CreateSemaphore\fR\&.
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4 .SH "SYNOPSIS"
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5 .PP
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6 \fB#include "SDL\&.h"
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7 #include "SDL_thread\&.h"
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8 .sp
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9 \fBvoid \fBSDL_DestroySemaphore\fP\fR(\fBSDL_sem *sem\fR);
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10 .SH "DESCRIPTION"
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11 .PP
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12 \fBSDL_DestroySemaphore\fP destroys the semaphore pointed to by \fBsem\fR that was created by \fI\fBSDL_CreateSemaphore\fP\fR\&. It is not safe to destroy a semaphore if there are threads currently blocked waiting on it\&.
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13 .SH "EXAMPLES"
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14 .PP
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15 .PP
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16 .nf
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17 \f(CWif (my_sem != NULL) {
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18 SDL_DestroySemaphore(my_sem);
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19 my_sem = NULL;
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20 }\fR
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21 .fi
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22 .PP
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23 .SH "SEE ALSO"
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24 .PP
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25 \fI\fBSDL_CreateSemaphore\fP\fR, \fI\fBSDL_SemWait\fP\fR, \fI\fBSDL_SemTryWait\fP\fR, \fI\fBSDL_SemWaitTimeout\fP\fR, \fI\fBSDL_SemPost\fP\fR, \fI\fBSDL_SemValue\fP\fR
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26 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00