#ifndef LWIP_ARCH_SYS_ARCH_H
#define LWIP_ARCH_SYS_ARCH_H
#define SYS_MBOX_NULL NULL
#define SYS_SEM_NULL NULL
struct sys_sem;
typedef struct sys_sem * sys_sem_t;
#define sys_sem_valid(sem) (((sem) != NULL) && (*(sem) != NULL))
#define sys_sem_valid_val(sem) ((sem) != NULL)
#define sys_sem_set_invalid(sem) do { if((sem) != NULL) { *(sem) = NULL; }}while(0)
#define sys_sem_set_invalid_val(sem) do { (sem) = NULL; }while(0)
struct sys_mutex;
typedef struct sys_mutex * sys_mutex_t;
#define sys_mutex_valid(mutex) sys_sem_valid(mutex)
#define sys_mutex_set_invalid(mutex) sys_sem_set_invalid(mutex)
struct sys_mbox;
typedef struct sys_mbox * sys_mbox_t;
#define sys_mbox_valid(mbox) sys_sem_valid(mbox)
#define sys_mbox_valid_val(mbox) sys_sem_valid_val(mbox)
#define sys_mbox_set_invalid(mbox) sys_sem_set_invalid(mbox)
#define sys_mbox_set_invalid_val(mbox) sys_sem_set_invalid_val(mbox)
struct sys_thread;
typedef struct sys_thread * sys_thread_t;
#if LWIP_NETCONN_SEM_PER_THREAD
sys_sem_t* sys_arch_netconn_sem_get(void);
void sys_arch_netconn_sem_alloc(void);
void sys_arch_netconn_sem_free(void);
#define LWIP_NETCONN_THREAD_SEM_GET() sys_arch_netconn_sem_get()
#define LWIP_NETCONN_THREAD_SEM_ALLOC() sys_arch_netconn_sem_alloc()
#define LWIP_NETCONN_THREAD_SEM_FREE() sys_arch_netconn_sem_free()
#endif
#define LWIP_EXAMPLE_APP_ABORT() lwip_unix_keypressed()
int lwip_unix_keypressed(void);
void sys_mark_tcpip_thread(void);
#define LWIP_MARK_TCPIP_THREAD() sys_mark_tcpip_thread()
#if LWIP_TCPIP_CORE_LOCKING
void sys_lock_tcpip_core(void);
#define LOCK_TCPIP_CORE() sys_lock_tcpip_core()
void sys_unlock_tcpip_core(void);
#define UNLOCK_TCPIP_CORE() sys_unlock_tcpip_core()
#endif
#endif