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這篇文章主要介紹“怎么使用純C語言實現異常捕獲try-catch組件”的相關知識,小編通過實際案例向大家展示操作過程,操作方法簡單快捷,實用性強,希望這篇“怎么使用純C語言實現異常捕獲try-catch組件”文章能幫助大家解決問題。
在java,python,c++里面都有try catch異常捕獲。在try代碼塊里面執行的函數,如果出錯有異常了,就會throw把異常拋出來,拋出來的異常被catch接收進行處理,而finally意味著無論有沒有異常,都會執行finally代碼塊內的代碼。
try{ connect_sql();//throw }catch(){ }finally { };
關于跳轉,有兩個跳轉。那么在這里我們必然選用長跳轉。
goto:函數內跳轉,短跳轉
setjmp/longjmp:跨函數跳轉,長跳轉
setjmp/longjmp這兩個函數是不存在壓棧出棧的,也就是說longjmp跳轉到setjmp的地方后,會覆蓋之前的棧。
setjmp(env):設置跳轉的位置,第一次返回0,后續返回longjmp的第二個參數
longjmp(env, idx):跳轉到設置env的位置,第二個參數就是setjmp()的返回值
#include <stdio.h> #include <setjmp.h> jmp_buf env; int count = 0; void sub_func(int idx) { printf("sub_func -->idx : %d\n", idx); //第二個參數就是setjmp()的返回值 longjmp(env, idx); } int main() { int idx = 0; //設置跳轉標簽,第一次返回0 count = setjmp(env); if (count == 0) { printf("count : %d\n", count); sub_func(++idx); } else if (count == 1) { printf("count : %d\n", count); sub_func(++idx); } else if (count == 2) { printf("count : %d\n", count); sub_func(++idx); } else { printf("other count \n"); } return 0; }
count : 0 sub_func -->idx : 1 count : 1 sub_func -->idx : 2 count : 2 sub_func -->idx : 3 other count
try ---> setjmp(env) throw ---> longjmp(env,Exception) catch(Exception)
我們其實可以分析出來,setjmp和count==0的地方,相當于try,后面的else if 相當于catch,最后一個else,其實并不是finally,因為finally是不管怎么樣都會執行,上圖我標注的其實是誤導的。應該是下圖這樣才對。
4個關鍵字分析出來它們的關系之后,其實我們就能用宏定義來實現了。
#include <stdio.h> #include <setjmp.h> typedef struct _Exception { jmp_buf env; int exceptype; } Exception; #define Try(excep) if((excep.exceptype=setjmp(excep.env))==0) #define Catch(excep, ExcepType) else if(excep.exceptype==ExcepType) #define Throw(excep, ExcepType) longjmp(excep.env,ExcepType) #define Finally void throw_func(Exception ex, int idx) { printf("throw_func -->idx : %d\n", idx); Throw(ex, idx); } int main() { int idx = 0; Exception ex; Try(ex) { printf("ex.exceptype : %d\n", ex.exceptype); throw_func(ex, ++idx); } Catch(ex, 1) { printf("ex.exceptype : %d\n", ex.exceptype); } Catch(ex, 2) { printf("ex.exceptype : %d\n", ex.exceptype); } Catch(ex, 3) { printf("ex.exceptype : %d\n", ex.exceptype); } Finally{ printf("Finally\n"); }; return 0; }
ex.exceptype : 0 throw_func -->idx : 1 ex.exceptype : 1 Finally
雖然現在demo版看起來像這么回事了,但是還是有兩個問題:
在哪個文件哪個函數哪個行拋的異常?
try-catch嵌套怎么做?
try-catch線程安全怎么做?
系統提供了三個宏可以供我們使用,如果我們沒有catch到異常,我們就可以打印出來
__func__, __FILE__, __LINE__
我們知道try-catch是可以嵌套的,那么這就形成了一個棧的數據結構,現在下面有三個try,每個setjmp
對應的都是不同的jmp_buf
,那么我們可以定義一個jmp_buf的棧。
try{ try{ try{ }catch(){ } }catch(){ } }catch(){ }finally{ };
那么我們很容易能寫出來,既然是棧,try的時候我們就插入一個結點,catch的時候我們就pop一個出來。
#define EXCEPTION_MESSAGE_LENGTH 512 typedef struct _ntyException { const char *name; } ntyException; ntyException SQLException = {"SQLException"}; ntyException TimeoutException = {"TimeoutException"}; typedef struct _ntyExceptionFrame { jmp_buf env; int line; const char *func; const char *file; ntyException *exception; struct _ntyExceptionFrame *next; char message[EXCEPTION_MESSAGE_LENGTH + 1]; } ntyExceptionFrame; enum { ExceptionEntered = 0,//0 ExceptionThrown, //1 ExceptionHandled, //2 ExceptionFinalized//3 };
每個線程都可以try-catch,但是我們以及知道了是個棧結構,既ExceptionStack,那么每個線程是獨有一個ExceptionStack呢?還是共享同一個ExceptionStack?很明顯,A線程的異常應該有A的處理,而不是由B線程處理。那么我們就使用Linux線程私有數據Thread-specific Data(TSD)來做。
/* ** **** ******** **************** Thread safety **************** ******** **** ** */ #define ntyThreadLocalData pthread_key_t #define ntyThreadLocalDataSet(key, value) pthread_setspecific((key), (value)) #define ntyThreadLocalDataGet(key) pthread_getspecific((key)) #define ntyThreadLocalDataCreate(key) pthread_key_create(&(key), NULL) ntyThreadLocalData ExceptionStack; static void init_once(void) { ntyThreadLocalDataCreate(ExceptionStack); } static pthread_once_t once_control = PTHREAD_ONCE_INIT; void ntyExceptionInit(void) { pthread_once(&once_control, init_once); }
首先創建一個新節點入棧,然后setjmp設置一個標記,接下來就是大括號里面的操作了,如果有異常,那么就會被throw拋出來,為什么這里最后一行是if?因為longjmp的時候,返回的地方是setjmp,不要忘了!要時刻扣住longjmp和setjmp。
#define Try do { \ volatile int Exception_flag; \ ntyExceptionFrame frame; \ frame.message[0] = 0; \ frame.next = (ntyExceptionFrame*)ntyThreadLocalDataGet(ExceptionStack); \ ntyThreadLocalDataSet(ExceptionStack, &frame); \ Exception_flag = setjmp(frame.env); \ if (Exception_flag == ExceptionEntered) {
Try{ //... Throw(A, "A"); }
在這里,我們不應該把throw定義成宏,而應該定義成函數。這里分兩類,一類是try里面的throw,一類是沒有try直接throw。
對于try里面的異常,我們將其狀態變成ExceptionThrown,然后longjmp到setjmp的地方,由catch處理
對于直接拋的異常,必然沒有catch去捕獲,那么我們直接打印出來
如果第一種情況的異常,沒有被catch捕獲到怎么辦呢?后面會被ReThrow出來,對于再次被拋出,我們就直接進行打印異常
這里的##__VA_ARGS__
是可變參數,具體不多介紹了,不是本文重點。
#define ReThrow ntyExceptionThrow(frame.exception, frame.func, frame.file, frame.line, NULL) #define Throw(e, cause, ...) ntyExceptionThrow(&(e), __func__, __FILE__, __LINE__, cause, ##__VA_ARGS__,NULL)
void ntyExceptionThrow(ntyException *excep, const char *func, const char *file, int line, const char *cause, ...) { va_list ap; ntyExceptionFrame *frame = (ntyExceptionFrame *) ntyThreadLocalDataGet(ExceptionStack); if (frame) { //異常名 frame->exception = excep; frame->func = func; frame->file = file; frame->line = line; //異常打印的信息 if (cause) { va_start(ap, cause); vsnprintf(frame->message, EXCEPTION_MESSAGE_LENGTH, cause, ap); va_end(ap); } ntyExceptionPopStack; longjmp(frame->env, ExceptionThrown); } //沒有被catch,直接throw else if (cause) { char message[EXCEPTION_MESSAGE_LENGTH + 1]; va_start(ap, cause); vsnprintf(message, EXCEPTION_MESSAGE_LENGTH, cause, ap); va_end(ap); printf("%s: %s\n raised in %s at %s:%d\n", excep->name, message, func ? func : "?", file ? file : "?", line); } else { printf("%s: %p\n raised in %s at %s:%d\n", excep->name, excep, func ? func : "?", file ? file : "?", line); } }
如果還是ExceptionEntered狀態,說明沒有異常,沒有throw。如果捕獲到異常了,那么其狀態就是ExceptionHandled。
#define Catch(nty_exception) \ if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; \ } else if (frame.exception == &(nty_exception)) { \ Exception_flag = ExceptionHandled;
finally也是一樣,如果還是ExceptionEntered狀態,說明沒有異常沒有捕獲,那么現在狀態是終止階段。
#define Finally \ if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; \ } { \ if (Exception_flag == ExceptionEntered) \ Exception_flag = ExceptionFinalized;
有些人看到EndTry可能會有疑問,try-catch一共不就4個關鍵字嗎?怎么你多了一個。我們先來看看EndTry做了什么,首先如果是ExceptionEntered狀態,那意味著什么?意味著沒有throw,沒有catch,沒有finally,只有try,我們需要對這種情況進行處理,要出棧。
還有一種情況,如果是ExceptionThrown狀態,說明什么?沒有被catch捕獲到,那么我們就再次拋出,進行打印錯誤。至于為什么多個EndTry,寫起來方便唄~
#define EndTry \ if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; \ } if (Exception_flag == ExceptionThrown) {ReThrow;} \ } while (0)
/* ** **** ******** **************** try / catch / finally / throw **************** ******** **** ** */ #define EXCEPTION_MESSAGE_LENGTH 512 typedef struct _ntyException { const char *name; } ntyException; ntyException SQLException = {"SQLException"}; ntyException TimeoutException = {"TimeoutException"}; typedef struct _ntyExceptionFrame { jmp_buf env; int line; const char *func; const char *file; ntyException *exception; struct _ntyExceptionFrame *next; char message[EXCEPTION_MESSAGE_LENGTH + 1]; } ntyExceptionFrame; enum { ExceptionEntered = 0,//0 ExceptionThrown, //1 ExceptionHandled, //2 ExceptionFinalized//3 }; #define ntyExceptionPopStack \ ntyThreadLocalDataSet(ExceptionStack, ((ntyExceptionFrame*)ntyThreadLocalDataGet(ExceptionStack))->next) #define ReThrow ntyExceptionThrow(frame.exception, frame.func, frame.file, frame.line, NULL) #define Throw(e, cause, ...) ntyExceptionThrow(&(e), __func__, __FILE__, __LINE__, cause, ##__VA_ARGS__,NULL) #define Try do { \ volatile int Exception_flag; \ ntyExceptionFrame frame; \ frame.message[0] = 0; \ frame.next = (ntyExceptionFrame*)ntyThreadLocalDataGet(ExceptionStack); \ ntyThreadLocalDataSet(ExceptionStack, &frame); \ Exception_flag = setjmp(frame.env); \ if (Exception_flag == ExceptionEntered) { #define Catch(nty_exception) \ if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; \ } else if (frame.exception == &(nty_exception)) { \ Exception_flag = ExceptionHandled; #define Finally \ if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; \ } { \ if (Exception_flag == ExceptionEntered) \ Exception_flag = ExceptionFinalized; #define EndTry \ if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; \ } if (Exception_flag == ExceptionThrown) {ReThrow;} \ } while (0) void ntyExceptionThrow(ntyException *excep, const char *func, const char *file, int line, const char *cause, ...) { va_list ap; ntyExceptionFrame *frame = (ntyExceptionFrame *) ntyThreadLocalDataGet(ExceptionStack); if (frame) { //異常名 frame->exception = excep; frame->func = func; frame->file = file; frame->line = line; //異常打印的信息 if (cause) { va_start(ap, cause); vsnprintf(frame->message, EXCEPTION_MESSAGE_LENGTH, cause, ap); va_end(ap); } ntyExceptionPopStack; longjmp(frame->env, ExceptionThrown); } //沒有被catch,直接throw else if (cause) { char message[EXCEPTION_MESSAGE_LENGTH + 1]; va_start(ap, cause); vsnprintf(message, EXCEPTION_MESSAGE_LENGTH, cause, ap); va_end(ap); printf("%s: %s\n raised in %s at %s:%d\n", excep->name, message, func ? func : "?", file ? file : "?", line); } else { printf("%s: %p\n raised in %s at %s:%d\n", excep->name, excep, func ? func : "?", file ? file : "?", line); } }
/* ** **** ******** **************** debug **************** ******** **** ** */ ntyException A = {"AException"}; ntyException B = {"BException"}; ntyException C = {"CException"}; ntyException D = {"DException"}; void *thread(void *args) { pthread_t selfid = pthread_self(); Try { Throw(A, "A"); } Catch (A) { printf("catch A : %ld\n", selfid); } EndTry; Try { Throw(B, "B"); } Catch (B) { printf("catch B : %ld\n", selfid); } EndTry; Try { Throw(C, "C"); } Catch (C) { printf("catch C : %ld\n", selfid); } EndTry; Try { Throw(D, "D"); } Catch (D) { printf("catch D : %ld\n", selfid); } EndTry; Try { Throw(A, "A Again"); Throw(B, "B Again"); Throw(C, "C Again"); Throw(D, "D Again"); } Catch (A) { printf("catch A again : %ld\n", selfid); } Catch (B) { printf("catch B again : %ld\n", selfid); } Catch (C) { printf("catch C again : %ld\n", selfid); } Catch (D) { printf("catch B again : %ld\n", selfid); } EndTry; } #define PTHREAD_NUM 8 int main(void) { ntyExceptionInit(); printf("\n\n=> Test1: Throw\n"); { Throw(D, NULL); //ntyExceptionThrow(&(D), "_function_name_", "_file_name_", 202, ((void *) 0), ((void *) 0)) Throw(C, "null C"); //ntyExceptionThrow(&(C), "_function_name_", "_file_name_", 203, "null C", ((void *) 0)) } printf("=> Test1: Ok\n\n"); printf("\n\n=> Test2: Try-Catch Double Nesting\n"); { Try { Try { Throw(B, "call B"); } Catch (B) { printf("catch B \n"); } EndTry; Throw(A, NULL); } Catch(A) { printf("catch A \n"); printf("Result: Ok\n"); } EndTry; } printf("=> Test2: Ok\n\n"); printf("\n\n=> Test3: Try-Catch Triple Nesting\n"); { Try { Try { Try { Throw(C, "call C"); } Catch (C) { printf("catch C\n"); } EndTry; Throw(B, "call B"); } Catch (B) { printf("catch B\n"); } EndTry; Throw(A, NULL); } Catch(A) { printf("catch A\n"); } EndTry; } printf("=> Test3: Ok\n\n"); printf("=> Test4: Test Thread-safeness\n"); int i = 0; pthread_t th_id[PTHREAD_NUM]; for (i = 0; i < PTHREAD_NUM; i++) { pthread_create(&th_id[i], NULL, thread, NULL); } for (i = 0; i < PTHREAD_NUM; i++) { pthread_join(th_id[i], NULL); } printf("=> Test4: Ok\n\n"); printf("\n\n=> Test5: No Success Catch\n"); { Try { Throw(A, "no catch A ,should Rethrow"); } EndTry; } printf("=> Test5: Rethrow Success\n\n"); printf("\n\n=> Test6: Normal Test\n"); { Try { Throw(A, "call A"); } Catch(A) { printf("catch A\n"); } Finally { printf("wxf nb\n"); }; EndTry; } printf("=> Test6: ok\n\n"); }
#include <stdio.h> #include <setjmp.h> #include <pthread.h> #include <stdarg.h> /* ** **** ******** **************** Thread safety **************** ******** **** ** */ #define ntyThreadLocalData pthread_key_t #define ntyThreadLocalDataSet(key, value) pthread_setspecific((key), (value)) #define ntyThreadLocalDataGet(key) pthread_getspecific((key)) #define ntyThreadLocalDataCreate(key) pthread_key_create(&(key), NULL) ntyThreadLocalData ExceptionStack; static void init_once(void) { ntyThreadLocalDataCreate(ExceptionStack); } static pthread_once_t once_control = PTHREAD_ONCE_INIT; void ntyExceptionInit(void) { pthread_once(&once_control, init_once); } /* ** **** ******** **************** try / catch / finally / throw **************** ******** **** ** */ #define EXCEPTION_MESSAGE_LENGTH 512 typedef struct _ntyException { const char *name; } ntyException; ntyException SQLException = {"SQLException"}; ntyException TimeoutException = {"TimeoutException"}; typedef struct _ntyExceptionFrame { jmp_buf env; int line; const char *func; const char *file; ntyException *exception; struct _ntyExceptionFrame *next; char message[EXCEPTION_MESSAGE_LENGTH + 1]; } ntyExceptionFrame; enum { ExceptionEntered = 0,//0 ExceptionThrown, //1 ExceptionHandled, //2 ExceptionFinalized//3 }; #define ntyExceptionPopStack \ ntyThreadLocalDataSet(ExceptionStack, ((ntyExceptionFrame*)ntyThreadLocalDataGet(ExceptionStack))->next) #define ReThrow ntyExceptionThrow(frame.exception, frame.func, frame.file, frame.line, NULL) #define Throw(e, cause, ...) ntyExceptionThrow(&(e), __func__, __FILE__, __LINE__, cause, ##__VA_ARGS__,NULL) #define Try do { \ volatile int Exception_flag; \ ntyExceptionFrame frame; \ frame.message[0] = 0; \ frame.next = (ntyExceptionFrame*)ntyThreadLocalDataGet(ExceptionStack); \ ntyThreadLocalDataSet(ExceptionStack, &frame); \ Exception_flag = setjmp(frame.env); \ if (Exception_flag == ExceptionEntered) { #define Catch(nty_exception) \ if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; \ } else if (frame.exception == &(nty_exception)) { \ Exception_flag = ExceptionHandled; #define Finally \ if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; \ } { \ if (Exception_flag == ExceptionEntered) \ Exception_flag = ExceptionFinalized; #define EndTry \ if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; \ } if (Exception_flag == ExceptionThrown) {ReThrow;} \ } while (0) void ntyExceptionThrow(ntyException *excep, const char *func, const char *file, int line, const char *cause, ...) { va_list ap; ntyExceptionFrame *frame = (ntyExceptionFrame *) ntyThreadLocalDataGet(ExceptionStack); if (frame) { //異常名 frame->exception = excep; frame->func = func; frame->file = file; frame->line = line; //異常打印的信息 if (cause) { va_start(ap, cause); vsnprintf(frame->message, EXCEPTION_MESSAGE_LENGTH, cause, ap); va_end(ap); } ntyExceptionPopStack; longjmp(frame->env, ExceptionThrown); } //沒有被catch,直接throw else if (cause) { char message[EXCEPTION_MESSAGE_LENGTH + 1]; va_start(ap, cause); vsnprintf(message, EXCEPTION_MESSAGE_LENGTH, cause, ap); va_end(ap); printf("%s: %s\n raised in %s at %s:%d\n", excep->name, message, func ? func : "?", file ? file : "?", line); } else { printf("%s: %p\n raised in %s at %s:%d\n", excep->name, excep, func ? func : "?", file ? file : "?", line); } } /* ** **** ******** **************** debug **************** ******** **** ** */ ntyException A = {"AException"}; ntyException B = {"BException"}; ntyException C = {"CException"}; ntyException D = {"DException"}; void *thread(void *args) { pthread_t selfid = pthread_self(); Try { Throw(A, "A"); } Catch (A) { printf("catch A : %ld\n", selfid); } EndTry; Try { Throw(B, "B"); } Catch (B) { printf("catch B : %ld\n", selfid); } EndTry; Try { Throw(C, "C"); } Catch (C) { printf("catch C : %ld\n", selfid); } EndTry; Try { Throw(D, "D"); } Catch (D) { printf("catch D : %ld\n", selfid); } EndTry; Try { Throw(A, "A Again"); Throw(B, "B Again"); Throw(C, "C Again"); Throw(D, "D Again"); } Catch (A) { printf("catch A again : %ld\n", selfid); } Catch (B) { printf("catch B again : %ld\n", selfid); } Catch (C) { printf("catch C again : %ld\n", selfid); } Catch (D) { printf("catch B again : %ld\n", selfid); } EndTry; } #define PTHREAD_NUM 8 int main(void) { ntyExceptionInit(); printf("\n\n=> Test1: Throw\n"); { Throw(D, NULL); //ntyExceptionThrow(&(D), "_function_name_", "_file_name_", 202, ((void *) 0), ((void *) 0)) Throw(C, "null C"); //ntyExceptionThrow(&(C), "_function_name_", "_file_name_", 203, "null C", ((void *) 0)) } printf("=> Test1: Ok\n\n"); printf("\n\n=> Test2: Try-Catch Double Nesting\n"); { Try { Try { Throw(B, "call B"); } Catch (B) { printf("catch B \n"); } EndTry; Throw(A, NULL); } Catch(A) { printf("catch A \n"); printf("Result: Ok\n"); } EndTry; } printf("=> Test2: Ok\n\n"); printf("\n\n=> Test3: Try-Catch Triple Nesting\n"); { Try { Try { Try { Throw(C, "call C"); } Catch (C) { printf("catch C\n"); } EndTry; Throw(B, "call B"); } Catch (B) { printf("catch B\n"); } EndTry; Throw(A, NULL); } Catch(A) { printf("catch A\n"); } EndTry; } printf("=> Test3: Ok\n\n"); printf("=> Test4: Test Thread-safeness\n"); int i = 0; pthread_t th_id[PTHREAD_NUM]; for (i = 0; i < PTHREAD_NUM; i++) { pthread_create(&th_id[i], NULL, thread, NULL); } for (i = 0; i < PTHREAD_NUM; i++) { pthread_join(th_id[i], NULL); } printf("=> Test4: Ok\n\n"); printf("\n\n=> Test5: No Success Catch\n"); { Try { Throw(A, "no catch A ,should Rethrow"); } EndTry; } printf("=> Test5: Rethrow Success\n\n"); printf("\n\n=> Test6: Normal Test\n"); { Try { Throw(A, "call A"); } Catch(A) { printf("catch A\n"); } Finally { printf("wxf nb\n"); }; EndTry; } printf("=> Test6: ok\n\n"); } void all() { ///////////try do { volatile int Exception_flag; ntyExceptionFrame frame; frame.message[0] = 0; frame.next = (ntyExceptionFrame *) pthread_getspecific((ExceptionStack)); pthread_setspecific((ExceptionStack), (&frame)); Exception_flag = _setjmp(frame.env); if (Exception_flag == ExceptionEntered) { /////////// { ///////////try do { volatile int Exception_flag; ntyExceptionFrame frame; frame.message[0] = 0; frame.next = (ntyExceptionFrame *) pthread_getspecific((ExceptionStack)); pthread_setspecific((ExceptionStack), (&frame)); Exception_flag = _setjmp(frame.env); if (Exception_flag == ExceptionEntered) { /////////// { ///////////Throw(B, "recall B"); --->longjmp ExceptionThrown ntyExceptionThrow(&(B), "_function_name_", "_file_name_", 302, "recall B", ((void *) 0)); /////////// } ///////////Catch (B) if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; } else if (frame.exception == &(B)) { Exception_flag = ExceptionHandled; /////////// { /////////// printf("recall B \n"); /////////// } ////////fin if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; if (Exception_flag == ExceptionEntered) Exception_flag = ExceptionFinalized; /////////////////{ { printf("fin\n"); }; ////////////////////} ///////////EndTry; if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; } if (Exception_flag == ExceptionThrown) ntyExceptionThrow(frame.exception, frame.func, frame.file, frame.line, ((void *) 0)); } while (0); ///////////Throw(A, NULL); longjmp ExceptionThrown ntyExceptionThrow(&(A), "_function_name_", "_file_name_", 329, ((void *) 0), ((void *) 0)); /////////// } ///////////Catch(A) if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; } else if (frame.exception == &(A)) { Exception_flag = ExceptionHandled; /////////// { /////////// printf("\tResult: Ok\n"); /////////// } /////////// EndTry; if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; } if (Exception_flag == ExceptionThrown) ntyExceptionThrow(frame.exception, frame.func, frame.file, frame.line, ((void *) 0)); } while (0); /////////// }
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