PLZ help

[litva]

Hi all.guys, i has had a problem with my code.i am trying to start a new thread.

Code:

error = pthread_create(&tid[0],
                           NULL,
                           pull_one_url,
                           (void*)urls[0]);

but the game is frozen with bus error or without error .what'is it?i am out of my ideas.
it's need me to work with internet how in standart browser.image draw and other pictures write in buffer from site.

[AlphaDingDong]

The PSP doesn't use pthreads.  It has its own threading lib (which is pretty similar).

Check here:
http://psp.jim.sh/pspsdk-doc/group__ThreadMan.html

And also search the site for thread examples.

[litva]

/*
   pthread library for the PSP
   Copyright (C) 2006  Rafael Cabezas a.k.a. Raf

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; either version 2
   of the License, or (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
very strange.thank for advise.now i am going to use sceKernelCreateThread."initPriority    The initial priority of the thread. Less if higher priority"what is it ?what does  thread start early.

[Raphael]

There is no "start early" on PSP, because the threading is coop, not pre-emtive. The question is when do you give your threads time to process, through a sleep/delay in your main thread.

Other than that, it's as is stated, a lower value denotes a higher priority, with 0 the highest. You shouldn't really use anything above priority 12 or 10.

[litva]

on no thid = sceKernelCreateThread("my_thread",(SceKernelThreadEntry)pull_one_url ,10, 0x10000, 0, 0);
            if(thid >= 0)
            {
               sceKernelStartThread(thid, sizeof(urls[0]), (void*)urls[0]);
            }
return bus error.

[AlphaDingDong]

Adapted from a sample I found somewhere a long time ago.  I just compiled it and ran it without incident:

Code:

#include <pspkernel.h>
#include <pspctrl.h>
#include <pspdebug.h>
#include <pspdisplay.h>

PSP_MODULE_INFO("PSP Threading", 0, 1, 1);

int running = 1;

int threadFunction(SceSize argsize, void* arg) { //thread functions must prototype to "int func(Scesize, void*)"
  while(running) {
    pspDebugScreenPrintf("This is the thread talking.\n");
    sceKernelDelayThread(1); //a sceKernelDelayThread yields time to other threads
  }
  sceKernelExitDeleteThread(0); //thread exits and deletes itself
  return 0;
}

int main() {
  pspDebugScreenInit();
  SceCtrlData pad;
 
  int thid = sceKernelCreateThread("Talking Thread", threadFunction, 0x10, 0x1000, 0, NULL); //get thread handle - args are ("arbitrary process name", entry point function, thread priority, stack size, attribute flags, SceKernelThreadOptParam*)
  sceKernelStartThread(thid, 0, NULL); //start the thread - args 2 and 3 are passed into the thread function
 
  while(running) {
    sceCtrlPeekBufferPositive(&pad, 1);
    if(pad.Buttons & PSP_CTRL_CROSS) {running = 0;}
    pspDebugScreenPrintf("This is the main thread talking.\n");
    sceKernelDelayThread(1);
  }
  sceKernelDelayThread(3000000); //pause for a moment so you can see the result
  sceKernelExitGame();
  return 0;
}

[litva]

My program stops when there is a start of a new thread, but your example is compiled and starts  well

[AlphaDingDong]

 

What?

[litva]

my program is frozen when thread starts!!!

[Raphael]

can't answer why, without showing us the exact code.

[litva]

static int pull_one_url(char *url)
   {
   curl = curl_easy_init();

      
      curl_easy_setopt(curl, CURLOPT_URL, url);
      

      curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writer);

      //указываем куда записывать принимаемые данные
      curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
      curl_easy_perform(curl);

      return 1;
   }
   int threadFunction(SceSize argsize, void* arg){
      pull_one_url(urls[0]);
      sceKernelExitDeleteThread(0);
      return 1;
   }
...
thid1 = sceKernelCreateThread("Talking Thread", threadFunction, 0x05, 0x1000, 0, 0);
sceKernelStartThread(thid1, 0, NULL);
...

[Raphael]

1. use code tags when posting code

   int threadFunction(SceSize argsize, void* arg){
      pull_one_url(urls[0]);
      sceKernelExitDeleteThread(0);
      return 1;
   }

2. Where/how is the urls array declared?
3. Why do you start a thread, that in turn just calls a single function and returns? Since the function itself is blocking and the psp has a coop threading model, you actually gain nothing from starting it in a thread, other than possibly delaying the function call a little bit, depending on what you main thread does after creating this thread.

thid1 = sceKernelCreateThread("Talking Thread", threadFunction, 0x05, 0x1000, 0, 0);

0x5 is pretty high priority and shouldn't be used unless you know what you do. Start with something like 0x18 and slowly decrease it, if you feel the thread isn't "responsive" enough.

[litva]

Code:

const char * const urls[4]= {
 "http://ourgame.orgfree.com/store/",
 "ftp://cool.haxx.se/",
 "http://www.contactor.se/",
 "www.haxx.se"
};

thread starts and returns bus error,This function stops thread and waits while the page is loading .