Leahnaya/SDL
1
0
Fork 0
mirror of https://github.com/yawut/SDL.git synced 2026-09-08 00:56:24 -05:00
Code Issues Actions Packages Projects Releases Wiki Activity

The API sets the priority for the current thread, not an arbitrary thread.

Browse Source 
Implemented thread priority as the 'nice' value on Linux.  High priority threads require root permissions (you shouldn't give your game root permissions though!)
This commit is contained in:
Sam Lantinga
2011-03-25 12:44:06 -07:00
parent b12e397498
commit 73247db7d8
9 changed files with 51 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
src/thread/pthread/SDL_systhread.c
View File

@@ -23,6 +23,11 @@
#include <pthread.h>
#include <signal.h>
#ifdef linux
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/syscall.h>
#endif
#include "SDL_thread.h"
#include "../SDL_thread_c.h"
@@ -34,6 +39,7 @@ static const int sig_list[] = {
SIGVTALRM, SIGPROF, 0
};
static void *
RunThread(void *data)
{
@@ -92,12 +98,29 @@ SDL_ThreadID(void)
}
int
SDL_SYS_SetThreadPriority(SDL_Thread * thread, SDL_ThreadPriority priority)
SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
{
#ifdef linux
int value;
if (priority == SDL_THREAD_PRIORITY_LOW) {
value = 19;
} else if (priority == SDL_THREAD_PRIORITY_HIGH) {
value = -20;
} else {
value = 0;
}
if (setpriority(PRIO_PROCESS, syscall(SYS_gettid), value) < 0) {
SDL_SetError("setpriority() failed");
return -1;
}
return 0;
#else
struct sched_param sched;
int policy;
pthread_t thread = pthread_self();
if (pthread_getschedparam(thread->handle, &policy, &sched) < 0) {
if (pthread_getschedparam(thread, &policy, &sched) < 0) {
SDL_SetError("pthread_getschedparam() failed");
return -1;
}
@@ -108,14 +131,14 @@ SDL_SYS_SetThreadPriority(SDL_Thread * thread, SDL_ThreadPriority priority)
} else {
int min_priority = sched_get_priority_min(policy);
int max_priority = sched_get_priority_max(policy);
int priority = (min_priority + (max_priority - min_priority) / 2);
sched.sched_priority = priority;
sched.sched_priority = (min_priority + (max_priority - min_priority) / 2);
}
if (pthread_setschedparam(thread->handle, policy, &sched) < 0) {
if (pthread_setschedparam(thread, policy, &sched) < 0) {
SDL_SetError("pthread_setschedparam() failed");
return -1;
}
return 0;
#endif /* linux */
}
void