try / catch / finally / throw 介绍
本文用纯c的代码，实现异常捕获try-catch组件。阅读本文需要时刻牢记setjmp和longjmp的对应关系。
在java，python，c++里面都有try catch异常捕获。在try代码块里面执行的函数，如果出错有异常了，就会throw把异常抛出来，抛出来的异常被catch接收进行处理，而finally意味着无论有没有异常，都会执行finally代码块内的代码。
try{
connect_sql();//throw
}catch(){
}finally {
};
如何实现try-catch这一机制？
关于跳转，有两个跳转。那么在这里我们必然选用长跳转。
- goto：函数内跳转，短跳转
- setjmp/longjmp：跨函数跳转，长跳转
setjmp/longjmp这两个函数是不存在压栈出栈的，也就是说longjmp跳转到setjmp的地方后，会覆盖之前的栈。
setjmp/longjmp使用介绍(重点)
- setjmp(env)：设置跳转的位置，第一次返回0，后续返回longjmp的第二个参数
- longjmp(env, idx)：跳转到设置env的位置，第二个参数就是setjmp()的返回值
#include#include jmp_buf env; int count = 0; void sub_func(int idx) { printf("sub_func -->idx : %d\n", idx); //第二个参数就是setjmp()的返回值 longjmp(env, idx); } int main() { int idx = 0; //设置跳转标签，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-catch 和 setjmp/longjmp 的关系
try ---> setjmp(env) throw ---> longjmp(env,Exception) catch(Exception)
我们其实可以分析出来，setjmp和count==0的地方，相当于try，后面的else if 相当于catch，最后一个else，其实并不是finally，因为finally是不管怎么样都会执行，上图我标注的其实是误导的。应该是下图这样才对。
宏定义实现try-catch Demo
4个关键字分析出来它们的关系之后，其实我们就能用宏定义来实现了。
#include#include 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
实现try-catch的三个问题
虽然现在demo版看起来像这么回事了，但是还是有两个问题：
- 在哪个文件哪个函数哪个行抛的异常？
- try-catch嵌套怎么做？
- try-catch线程安全怎么做？
1. 在哪个文件哪个函数哪个行抛的异常
系统提供了三个宏可以供我们使用，如果我们没有catch到异常，我们就可以打印出来
__func__, __FILE__, __LINE__
2. try-catch嵌套怎么做？
我们知道try-catch是可以嵌套的，那么这就形成了一个栈的数据结构，现在下面有三个try，每个setjmp对应的都是不同的jmp_buf,那么我们可以定义一个jmp_buf的栈。
try{
try{
try{
}catch(){
}
}catch(){
}
}catch(){
}finally{
};
那么我们很容易能写出来，既然是栈，try的时候我们就插入一个结点，catch的时候我们就pop一个出来。
#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
};
3. try-catch线程安全
每个线程都可以try-catch，但是我们以及知道了是个栈结构，既ExceptionStack，那么每个线程是独有一个ExceptionStack呢？还是共享同一个ExceptionStack？很明显，A线程的异常应该有A的处理，而不是由B线程处理。那么我们就使用Linux线程私有数据Thread-specific Data(TSD)来做。
/* ** **** ******** **************** 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);
}
代码实现与解释
try
首先创建一个新节点入栈，然后setjmp设置一个标记，接下来就是大括号里面的操作了，如果有异常，那么就会被throw抛出来，为什么这里最后一行是if？因为longjmp的时候，返回的地方是setjmp，不要忘了！要时刻扣住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");
}
throw
在这里，我们不应该把throw定义成宏，而应该定义成函数。这里分两类，一类是try里面的throw，一类是没有try直接throw。
- 对于try里面的异常，我们将其状态变成ExceptionThrown，然后longjmp到setjmp的地方，由catch处理
- 对于直接抛的异常，必然没有catch去捕获，那么我们直接打印出来
- 如果第一种情况的异常，没有被catch捕获到怎么办呢？后面会被ReThrow出来，对于再次被抛出，我们就直接进行打印异常
这里的##__VA_ARGS__是可变参数，具体不多介绍了，不是本文重点。
#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) {
//异常名
frame->exception = excep;
frame->func = func;
frame->file = file;
frame->line = line;
//异常打印的信息
if (cause) {
va_start(ap, cause);
vsnprintf(frame->message, EXCEPTION_MESSAGE_LENGTH, cause, ap);
va_end(ap);
}
ntyExceptionPopStack;
longjmp(frame->env, ExceptionThrown);
}
//没有被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);
}
}
Catch
如果还是ExceptionEntered状态，说明没有异常，没有throw。如果捕获到异常了，那么其状态就是ExceptionHandled。
#define Catch(nty_exception) \
if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; \
} else if (frame.exception == &(nty_exception)) { \
Exception_flag = ExceptionHandled;
Finally
finally也是一样，如果还是ExceptionEntered状态，说明没有异常没有捕获，那么现在状态是终止阶段。
#define Finally \
if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; \
} { \
if (Exception_flag == ExceptionEntered) \
Exception_flag = ExceptionFinalized;
EndTry
有些人看到EndTry可能会有疑问，try-catch一共不就4个关键字吗？怎么你多了一个。我们先来看看EndTry做了什么，首先如果是ExceptionEntered状态，那意味着什么？意味着没有throw，没有catch，没有finally，只有try，我们需要对这种情况进行处理，要出栈。
还有一种情况，如果是ExceptionThrown状态，说明什么？没有被catch捕获到，那么我们就再次抛出，进行打印错误。至于为什么多个EndTry，写起来方便呗~
#define EndTry \
if (Exception_flag == ExceptionEntered) ntyExceptionPopStack; \
} if (Exception_flag == ExceptionThrown) {ReThrow;} \
} while (0)
try-catch代码
/* ** **** ******** **************** 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) {
//异常名
frame->exception = excep;
frame->func = func;
frame->file = file;
frame->line = line;
//异常打印的信息
if (cause) {
va_start(ap, cause);
vsnprintf(frame->message, EXCEPTION_MESSAGE_LENGTH, cause, ap);
va_end(ap);
}
ntyExceptionPopStack;
longjmp(frame->env, ExceptionThrown);
}
//没有被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测试代码
/* ** **** ******** **************** 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");
}
线程安全、try-catch、Debug测试代码 汇总
#include#include #include #include /* ** **** ******** **************** 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) { //异常名 frame->exception = excep; frame->func = func; frame->file = file; frame->line = line; //异常打印的信息 if (cause) { va_start(ap, cause); vsnprintf(frame->message, EXCEPTION_MESSAGE_LENGTH, cause, ap); va_end(ap); } ntyExceptionPopStack; longjmp(frame->env, ExceptionThrown); } //没有被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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