添加try catch 原理注释

soft/clexical.c

@@ -67,7 +67,7 @@ const keywork_item_def g_keyword_table[ ] = {
     TOKEN_DEF(continue,TOKEN_CONTINUE),
     TOKEN_DEF(const,TOKEN_CONST),
     TOKEN_DEF(static,TOKEN_STATIC),
-    TOKEN_DEF(unisgned,TOKEN_UNSIGNED),
+    TOKEN_DEF(unsigned,TOKEN_UNSIGNED),
     TOKEN_DEF(typedef,TOKEN_TYPEDEF),
     TOKEN_DEF(struct,TOKEN_STRUCT),
     TOKEN_DEF(enum,TOKEN_ENUM),

soft/exception.h

@@ -66,7 +66,10 @@ typedef struct{
   }\
 }
 
-
+/*
+ try 的时候保存当前回溯点，如果setjmp返回不为0 则已经产生异常回溯了，
+ 这时最后一个回溯点的使命已经完成，所以删除最后一个回溯点
+*/
 #define __try(){\
   exception_def *f=exception();\
   jmp_fram **h=&f->jmp_head;\
@@ -80,6 +83,11 @@ typedef struct{
 }
 
 #define try_ __try();if(exception()->ret==0){
+
+/*
+  如果try一直执行到这里则不会产生回溯了，最后一个回溯点的使命也已经完成了，
+  所以这里删除最后一个回溯点
+*/
 #define catch_ {\
   exception_def *f=exception();\
   jmp_fram **h=&f->jmp_head;\

test/signal_test.c

@@ -37,8 +37,8 @@
 // // 封装函数用来调用实际的槽函数
 // static void test_slot_caller(void* args) {
 //   test_slot_args* a = args;
-//   printf("test_slot_caller: %d %d\n", a->a, a->b);
+//   DBG_LOG("test_slot_caller: %d %d\n", a->a, a->b);
-//   printf("args_p=%p\n", a);
+//   DBG_LOG("args_p=%p\n", a);
 //   test_slot(a->self, a->a, a->b);
 // }
 
@@ -104,18 +104,18 @@ static void mdelay(unsigned long mSec){
 
 // 定义槽函数
 slot test_slot(test_sig_obj2* obj, int a, int b) {
-  printf("test_slot var=%d\n", obj->test_var);
+  DBG_LOG("test_slot var=%d\n", obj->test_var);
   obj->test_var = a + b;
-  printf("test_slot var=%d\n", obj->test_var);
+  DBG_LOG("test_slot var=%d\n", obj->test_var);
 }
 
 slot test_slot3(test_sig_obj3* obj, int a, int b) {
-  printf("test_slot3 a=%d, b=%d\n", a, b);
+  DBG_LOG("test_slot3 a=%d, b=%d\n", a, b);
-  printf("obj->v1=%d, obj->v2=%d\n", obj->test_var, obj->test_var2);
+  DBG_LOG("obj->v1=%d, obj->v2=%d\n", obj->test_var, obj->test_var2);
 }
 
 slot test_slot3_2(test_sig_obj3* obj, int a, int b, const char* c) {
-  printf("test_slot3_2 a=%d, b=%d, c=%s\n", a, b, c);
+  DBG_LOG("test_slot3_2 a=%d, b=%d, c=%s\n", a, b, c);
   throw_("test_slot3_2 err");
 }
 
@@ -123,9 +123,32 @@ static test_sig_obj g_sig_obj = { .test_var = 1, };
 static test_sig_obj2 g_sig_obj2 = { .test_var = 2, };
 static test_sig_obj3 g_sig_obj3;
 
+
+
+void try_catch_test() {
+  try_ {
+    DBG_LOG("进入第一个try");
+    DBG_LOG("抛出异常");
+    throw_("第一个try抛出的异常");
+  }catch_ {
+    DBG_LOG("进入第一个catch");
+    try_ {
+      DBG_LOG("进入第二个try");
+      throw_("第二个try抛出的异常");
+    }catch_ {
+      DBG_LOG("进入第二个catch");
+      throw_("第二个catch抛出的异常");
+    }
+  }
+}
+
+
+
+
+
 int thread_fun(void* t) {
   mythread_t* th = sigthread_init("signal_thread");
-  printf("thread_fun start\n");
+  DBG_LOG("thread_fun start\n");
   connect(&g_sig_obj, test_signal, th, &g_sig_obj2, test_slot);
   connect(&g_sig_obj, test_signal, th, &g_sig_obj3, test_slot3);
   connect(&g_sig_obj, test_signal2, th, &g_sig_obj3, test_slot3_2);
@@ -134,8 +157,8 @@ int thread_fun(void* t) {
   mdelay(1000);
   emit test_signal2(&g_sig_obj, 5, 6,"hello world");
   mdelay(1000);
-  printf("test end\n");
+  DBG_LOG("test end\n");
-  throw_("my err");
+  try_catch_test();
 
   return 0;
 }

test/test_fun2.c

@@ -104,15 +104,15 @@ int thread_fun(void* t)
     tmp[i] = bitmap[i];
   }
   ret = gpio_find_first_int((uint8_t*)tmp, sizeof(tmp), 0);
-  printf("ret=%d\n", ret - 1);
+  DBG_LOG("ret=%d\n", ret - 1);
   ret = gpio_find_first_int((uint8_t*)tmp, sizeof(tmp), ret);
-  printf("ret=%d\n", ret - 1);
+  DBG_LOG("ret=%d\n", ret - 1);
 
   for (int i = 0;i < sizeof(bitmap) / sizeof(bitmap[0]);i++) {
     tmp[i] = bitmap[i];
   }
   ret = iot_bitmap_ffs_from((uint8_t*)tmp, sizeof(tmp), 0);
-  printf("ret=%d\n", ret - 1);
+  DBG_LOG("ret=%d\n", ret - 1);
   ret = iot_bitmap_ffs_from((uint8_t*)tmp, sizeof(tmp), ret);
-  printf("ret=%d\n", ret - 1);
+  DBG_LOG("ret=%d\n", ret - 1);
 }