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wrong CLOCKS_PER_SEC?

 
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Shine



Joined: 03 Dec 2004
Posts: 728
Location: Germany
PostPosted: Sun Sep 04, 2005 8:48 am    Post subject: wrong CLOCKS_PER_SEC? Reply with quote
I've used this Lua Player script:

Code:

white = Color.new(255, 255, 255)
while true do
   screen:clear()
   screen:print(0, 0, "clock: " .. os.clock(), white)
   screen.waitVblankStart()
   screen.flip()
   if Controls.read():start() then break end
end


and every second 1000 is added. os.clock() is implemented like this in the lua lib:

Code:

static int io_clock (lua_State *L) {
  lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);
  return 1;
}


so looks like CLOCKS_PER_SEC needs to be multiplied by 1000.
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cooleyandy



Joined: 02 Jul 2005
Posts: 41
PostPosted: Sun Sep 04, 2005 11:08 am    Post subject: Reply with quote
heh, looks like the same problem I have had. I asked this question also like a month ago with no response. Yes, it's 1,000,000 clock ticks per second and CLOCK_PER_SEC should be 1,000,000.
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Agoln



Joined: 08 Jun 2005
Posts: 326
Location: Fort Wayne, IN
PostPosted: Wed Sep 07, 2005 8:04 am    Post subject: Reply with quote
LUA problems should be in the LUA forum...

Moved.
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chaos



Joined: 10 Apr 2005
Posts: 135
PostPosted: Wed Sep 07, 2005 12:14 pm    Post subject: Reply with quote
Agoln wrote:
LUA problems should be in the LUA forum...

Moved.


gotta love the moderation around here ;)
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Shine



Joined: 03 Dec 2004
Posts: 728
Location: Germany
PostPosted: Wed Sep 07, 2005 4:27 pm    Post subject: Reply with quote
Agoln wrote:
LUA problems should be in the LUA forum...


This is not a Lua Player problem, moved back to PSPSDK Support and Development. Try this code:

Code:

#include <stdio.h>
#include <stdlib.h>
#include <pspkernel.h>
#include <pspdebug.h>
#include <pspdisplay.h>
#include <time.h>

/* Define the module info section */
PSP_MODULE_INFO("TEST", 0, 1, 1);

/* Define the main thread's attribute value (optional) */
PSP_MAIN_THREAD_ATTR(THREAD_ATTR_USER | THREAD_ATTR_VFPU);

int main(void)
{
   pspDebugScreenInit();

   int c = 0;
   clock_t t0 = clock();
   while (1) {
      clock_t t1 = clock();
      pspDebugScreenClear();
      int delta = t1 - t0;
      pspDebugScreenPrintf("%i", delta / CLOCKS_PER_SEC);
      sceDisplayWaitVblankStart();
      sceDisplayWaitVblankStart();
      if (c++ == 300) break;
   }
   sceKernelExitGame();

   return 0;
}


clock()/CLOCKS_PER_SEC is defined to give seconds, not milliseconds, but I don't know where to change it in PSPSDK.
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TyRaNiD



Joined: 18 Jan 2004
Posts: 918
PostPosted: Thu Sep 08, 2005 3:52 am    Post subject: Reply with quote
You wont find it in pspsdk because it is a newlib thing, seems Sony's clock function follows the POSIX standard by making clock in 1e6 units, while newlib err doesn't :P

I'll try and get around to adjusting it at some point (note: it shouldn't require a rebuild of newlib if you have it, just change it in /usr/local/pspdev/psp/include/time.h)
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Shine



Joined: 03 Dec 2004
Posts: 728
Location: Germany
PostPosted: Thu Sep 08, 2005 9:09 am    Post subject: Reply with quote
TyRaNiD wrote:
I'll try and get around to adjusting it at some point (note: it shouldn't require a rebuild of newlib if you have it, just change it in /usr/local/pspdev/psp/include/time.h)


Thanks, now it works.
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Shine



Joined: 03 Dec 2004
Posts: 728
Location: Germany
PostPosted: Tue Oct 25, 2005 2:46 am    Post subject: Reply with quote
The latest PSPSDK with GCC 4.0.2 has introduced the bug again, please patch it again.
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jimparis



Joined: 10 Jun 2005
Posts: 1179
Location: Boston
PostPosted: Tue Oct 25, 2005 6:18 am    Post subject: Reply with quote
It was broken back in r1096 when the newlib patch as regenerated. It should be fixed (for good) in r1218.
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Shine



Joined: 03 Dec 2004
Posts: 728
Location: Germany
PostPosted: Tue Oct 25, 2005 4:39 pm    Post subject: Reply with quote
jimparis wrote:
It was broken back in r1096 when the newlib patch as regenerated. It should be fixed (for good) in r1218.


Thanks, it works again.
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