lock.h

/*
 * Copyright (c) 2024 Raspberry Pi (Trading) Ltd.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
 
#ifndef _PICO_BOOTROM_LOCK_H
#define _PICO_BOOTROM_LOCK_H
 
#include "hardware/boot_lock.h"
#include "pico/bootrom_constants.h"
 
// PICO_CONFIG: PICO_BOOTROM_LOCKING_ENABLED, Enable/disable locking for bootrom functions that use shared resources. If this flag is enabled bootrom lock checking is turned on and BOOT locks are taken around the relevant bootrom functions, type=bool, default=1, group=pico_bootrom
#ifndef PICO_BOOTROM_LOCKING_ENABLED
#if NUM_BOOT_LOCKS > 0
#define PICO_BOOTROM_LOCKING_ENABLED 1
#endif
#endif

static inline bool bootrom_try_acquire_lock(uint lock_num) {
#if PICO_BOOTROM_LOCKING_ENABLED
    // unsafe as this is a long term lock (so no irq disable)
    return boot_try_lock_unsafe(boot_lock_instance(lock_num));
#else
    (void)lock_num;
    return true;
#endif
}

static inline void bootrom_acquire_lock_blocking(uint lock_num) {
#if PICO_BOOTROM_LOCKING_ENABLED
    // unsafe as this is a long term lock (so no irq disable)
    boot_lock_unsafe_blocking(boot_lock_instance(lock_num));
#else
    (void)lock_num;
#endif
}

static inline void bootrom_release_lock(uint lock_num) {
#if PICO_BOOTROM_LOCKING_ENABLED
    boot_unlock_unsafe(boot_lock_instance(lock_num));
#else
    (void)lock_num;
#endif
}
 
#endif