libk/stdlib/console.cc


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#include "stdlib.h"

constexpr size_t max_consoles = 4;
static Console* global_console[max_consoles] = {nullptr};
static size_t last_console = 0;

void Console::set(Console* ptr) {
  if (ptr != nullptr && last_console < max_consoles) {
    global_console[last_console++] = ptr;
  }
}

Iterator<Console*> Console::begin() {
  return Iterator<Console*>(global_console, last_console);
}

void abort() {
  /*
   * On gcc, a 'while(true) {}' will infinitely loop
   * but clang will optimize it away on -O2 if it's empty
   * therefore, add no-op
   */
  while (true) {
    asm volatile("nop");
  }
  __builtin_unreachable();
}