major restructuring, prepare for smp

code/drivers/net/lwip/include/arch/sys_arch.h

@@ -0,0 +1,51 @@
+#pragma once
+#ifndef LWIP_ARCH_SYS_ARCH_H
+#define LWIP_ARCH_SYS_ARCH_H
+
+#include <stdint.h>
+#include <lwip/opt.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct sys_sem;
+typedef struct sys_sem* sys_sem_t;
+#define SYS_SEM_NULL NULL
+#define sys_sem_valid(sem)             ((sem) && (*(sem) != NULL))
+#define sys_sem_valid_val(sem)         ((sem) != NULL)
+#define sys_sem_set_invalid(sem)       do { if ((sem)) { *(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)         ((mutex) && (*(mutex) != NULL))
+#define sys_mutex_valid_val(mutex)     ((mutex) != NULL)
+#define sys_mutex_set_invalid(mutex)   do { if ((mutex)) { *(mutex) = NULL; } } while (0)
+
+struct sys_mbox;
+typedef struct sys_mbox* sys_mbox_t;
+#define SYS_MBOX_NULL NULL
+#define sys_mbox_valid(mbox)           ((mbox) && (*(mbox) != NULL))
+#define sys_mbox_valid_val(mbox)       ((mbox) != NULL)
+#define sys_mbox_set_invalid(mbox)     do { if ((mbox)) { *(mbox) = NULL; } } while (0)
+#define sys_mbox_set_invalid_val(mbox) do { (mbox) = NULL; } while (0)
+
+/*
+ * lwIP only treats sys_thread_t as an opaque handle.  Keep it pointer-sized.
+ *
+ * Do NOT make this a by-value incomplete struct.  MSVC may compile callers
+ * that see only the incomplete type with a hidden struct-return parameter,
+ * which shifts sys_thread_new(name, thread, arg, ...) so the callee receives
+ * thread == name and arg == thread.  The first tcpip_thread then jumps into
+ * the literal string "tcpip" as code.
+ */
+typedef void* sys_thread_t;
+
+void LwipPortSetTimerQuery(uint64_t (*query_ticks_us)(void));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_ARCH_SYS_ARCH_H */