extimer(3alleg4)

✨ extimer — using the timer (delays and interrupts) ✨

okay bestie, so this is extimer, and it lives in the Allegro manual — specifically the Allegro game programming library, section 3alleg4. it's a whole demo page, iykyk. 🎀

🌸 SYNOPSIS 🌸

#include <allegro.h>

Example extimer

💖 DESCRIPTION 💖

so this program is literally here to show you how to use the timer routines, and ngl, they can be a bit of a pain 😭 — because you have to be sure you lock all the memory that's used inside your interrupt handlers. no exceptions. lock it all. periodt.

The first part of the example shows a basic use of timing using the blocking function rest(). simple. iconic. blocking, but make it ✨intentional✨.

The second part? that's where it gets spicy 🔥 — it shows how to use three timers with different frequencies in a non blocking way. main character energy, fr fr.

lowkey the memory-locking thing is the part that bites people, so if your interrupt handler touches a variable, bestie, it needs to be locked. do not skip that step. 💅

👑 SEE ALSO 👑

• END_OF_FUNCTION(3alleg4)
• END_OF_MAIN(3alleg4)
• LOCK_FUNCTION(3alleg4)
• LOCK_VARIABLE(3alleg4)
• SCREEN_W(3alleg4)
• allegro_error(3alleg4)
• allegro_init(3alleg4)
• allegro_message(3alleg4)
• clear_to_color(3alleg4)
• desktop_palette(3alleg4)
• font(3alleg4)
• install_int(3alleg4)
• install_int_ex(3alleg4)
• install_keyboard(3alleg4)
• install_timer(3alleg4)
• key(3alleg4)
• keypressed(3alleg4)
• makecol(3alleg4)
• readkey(3alleg4)
• rest(3alleg4)
• screen(3alleg4)
• set_gfx_mode(3alleg4)
• set_palette(3alleg4)
• textprintf_centre_ex(3alleg4)

and that's the whole vibe!! 🦋 this page is from Allegro, version 4.4.3 — so like, shoutout to the Allegro era for real, this is extimer(3alleg4) signing off. go lock your variables bestie, ily 🫶💖