-
-#define JMPENV_BOOTSTRAP \
- STMT_START { \
- Zero(&PL_start_env, 1, JMPENV); \
- PL_start_env.je_ret = -1; \
- PL_start_env.je_mustcatch = TRUE; \
- PL_top_env = &PL_start_env; \
- } STMT_END
-
-#ifdef PERL_FLEXIBLE_EXCEPTIONS
-
-/*
- * These exception-handling macros are split up to
- * ease integration with C++ exceptions.
- *
- * To use C++ try+catch to catch Perl exceptions, an extension author
- * needs to first write an extern "C" function to throw an appropriate
- * exception object; typically it will be or contain an integer,
- * because Perl's internals use integers to track exception types:
- * extern "C" { static void thrower(int i) { throw i; } }
- *
- * Then (as shown below) the author needs to use, not the simple
- * JMPENV_PUSH, but several of its constitutent macros, to arrange for
- * the Perl internals to call thrower() rather than longjmp() to
- * report exceptions:
- *
- * dJMPENV;
- * JMPENV_PUSH_INIT(thrower);
- * try {
- * ... stuff that may throw exceptions ...
- * }
- * catch (int why) { // or whatever matches thrower()
- * JMPENV_POST_CATCH;
- * EXCEPT_SET(why);
- * switch (why) {
- * ... // handle various Perl exception codes
- * }
- * }
- * JMPENV_POP; // don't forget this!
- */
-
-/*
- * Function that catches/throws, and its callback for the
- * body of protected processing.
- */
-typedef void *(CPERLscope(*protect_body_t)) (pTHX_ va_list);
-typedef void *(CPERLscope(*protect_proc_t)) (pTHX_ volatile JMPENV *pcur_env,
- int *, protect_body_t, ...);
-
-#define dJMPENV JMPENV cur_env; \
- volatile JMPENV *pcur_env = ((cur_env.je_noset = 0),&cur_env)
-
-#define JMPENV_PUSH_INIT_ENV(ce,THROWFUNC) \
- STMT_START { \
- (ce).je_throw = (THROWFUNC); \
- (ce).je_ret = -1; \
- (ce).je_mustcatch = FALSE; \
- (ce).je_prev = PL_top_env; \
- PL_top_env = &(ce); \
- OP_REG_TO_MEM; \
- } STMT_END
-
-#define JMPENV_PUSH_INIT(THROWFUNC) JMPENV_PUSH_INIT_ENV(*(JMPENV*)pcur_env,THROWFUNC)
-
-#define JMPENV_POST_CATCH_ENV(ce) \
- STMT_START { \
- OP_MEM_TO_REG; \
- PL_top_env = &(ce); \
- } STMT_END
-
-#define JMPENV_POST_CATCH JMPENV_POST_CATCH_ENV(*(JMPENV*)pcur_env)
-
-#define JMPENV_PUSH_ENV(ce,v) \
- STMT_START { \
- if (!(ce).je_noset) { \
- DEBUG_l(Perl_deb(aTHX_ "Setting up jumplevel %p, was %p\n", \
- ce, PL_top_env)); \
- JMPENV_PUSH_INIT_ENV(ce,NULL); \
- EXCEPT_SET_ENV(ce,PerlProc_setjmp((ce).je_buf, 1));\
- (ce).je_noset = 1; \
- } \
- else \
- EXCEPT_SET_ENV(ce,0); \
- JMPENV_POST_CATCH_ENV(ce); \
- (v) = EXCEPT_GET_ENV(ce); \
- } STMT_END
-
-#define JMPENV_PUSH(v) JMPENV_PUSH_ENV(*(JMPENV*)pcur_env,v)
-
-#define JMPENV_POP_ENV(ce) \
- STMT_START { \
- if (PL_top_env == &(ce)) \
- PL_top_env = (ce).je_prev; \
- } STMT_END
-
-#define JMPENV_POP JMPENV_POP_ENV(*(JMPENV*)pcur_env)
-
-#define JMPENV_JUMP(v) \
- STMT_START { \
- OP_REG_TO_MEM; \
- if (PL_top_env->je_prev) { \
- if (PL_top_env->je_throw) \
- PL_top_env->je_throw(v); \
- else \
- PerlProc_longjmp(PL_top_env->je_buf, (v)); \
- } \
- if ((v) == 2) \
- PerlProc_exit(STATUS_NATIVE_EXPORT); \
- PerlIO_printf(Perl_error_log, "panic: top_env\n"); \
- PerlProc_exit(1); \
- } STMT_END
-
-#define EXCEPT_GET_ENV(ce) ((ce).je_ret)
-#define EXCEPT_GET EXCEPT_GET_ENV(*(JMPENV*)pcur_env)
-#define EXCEPT_SET_ENV(ce,v) ((ce).je_ret = (v))
-#define EXCEPT_SET(v) EXCEPT_SET_ENV(*(JMPENV*)pcur_env,v)
-
-#else /* !PERL_FLEXIBLE_EXCEPTIONS */
-
-#define dJMPENV JMPENV cur_env
-
-#define JMPENV_PUSH(v) \
- STMT_START { \
- DEBUG_l(Perl_deb(aTHX_ "Setting up jumplevel %p, was %p\n", \
- &cur_env, PL_top_env)); \
- cur_env.je_prev = PL_top_env; \
- OP_REG_TO_MEM; \
- cur_env.je_ret = PerlProc_setjmp(cur_env.je_buf, 1); \
- OP_MEM_TO_REG; \
- PL_top_env = &cur_env; \
- cur_env.je_mustcatch = FALSE; \
- (v) = cur_env.je_ret; \
- } STMT_END
-
-#define JMPENV_POP \
- STMT_START { PL_top_env = cur_env.je_prev; } STMT_END
-
-#define JMPENV_JUMP(v) \
- STMT_START { \
- OP_REG_TO_MEM; \
- if (PL_top_env->je_prev) \
- PerlProc_longjmp(PL_top_env->je_buf, (v)); \
- if ((v) == 2) \
- PerlProc_exit(STATUS_NATIVE_EXPORT); \
- PerlIO_printf(PerlIO_stderr(), "panic: top_env\n"); \
- PerlProc_exit(1); \
- } STMT_END
-
-#endif /* PERL_FLEXIBLE_EXCEPTIONS */
-
-#define CATCH_GET (PL_top_env->je_mustcatch)
-#define CATCH_SET(v) (PL_top_env->je_mustcatch = (v))