gba-link-connection/lib/iwram_code/LinkWireless.cpp

#include "../LinkWireless.hpp"

#ifdef LINK_WIRELESS_PUT_ISR_IN_IWRAM

#if LINK_WIRELESS_PUT_ISR_IN_IWRAM_SERIAL == 1
#define _LINK_SERIAL_ISR \
  LINK_CODE_IWRAM        \
  __attribute__((optimize(LINK_WIRELESS_PUT_ISR_IN_IWRAM_SERIAL_LEVEL)))
#else
#define _LINK_SERIAL_ISR
#endif

#if LINK_WIRELESS_PUT_ISR_IN_IWRAM_TIMER == 1
#define _LINK_TIMER_ISR \
  LINK_CODE_IWRAM       \
  __attribute__((optimize(LINK_WIRELESS_PUT_ISR_IN_IWRAM_TIMER_LEVEL)))
#else
#define _LINK_TIMER_ISR
#endif

_LINK_SERIAL_ISR void LinkWireless::_onSerial() {
  __onSerial();
}

_LINK_TIMER_ISR void LinkWireless::_onTimer() {
  __onTimer();
}

_LINK_SERIAL_ISR void LinkWireless::processMessage(u32 playerId,
                                                   u32 data,
                                                   u32& currentPacketId,
                                                   u32& playerBitMap,
                                                   int& playerBitMapCount) {
  _processMessage(playerId, data, currentPacketId, playerBitMap,
                  playerBitMapCount);
}

/**
 * NOTES:
 * When using `LINK_WIRELESS_ENABLE_NESTED_IRQ`:
 *   - Any user ISR can interrupt the library ISRs.
 *   - SERIAL ISR can interrupt TIMER ISR.
 *     -> This doesn't cause data races since TIMER ISR only works when
 *        there is no active async task.
 *     -> When TIMER ISR starts an async task (`transferAsync(...)`),
 *        nested interrupts are disabled (`REG_IME = 0`) and SERIAL cannot
 *        interrupt anymore.
 *   - TIMER interrupts are skipped if SERIAL ISR is running.
 *   - VBLANK interrupts are postponed if SERIAL or TIMER ISRs are running.
 *   - Nobody can interrupt VBLANK ISR.
 */

#endif