* points to this initially, so top_env should always be non-null.
*
* Existence of a non-null top_env->je_prev implies it is valid to call
- * (*je_jump)() at that runlevel. Always use the macros below! They
- * manage most of the complexity for you.
+ * longjmp() at that runlevel (we make sure start_env.je_prev is always
+ * null to ensure this).
*
* je_mustcatch, when set at any runlevel to TRUE, means eval ops must
* establish a local jmpenv to handle exception traps. Care must be taken
* to restore the previous value of je_mustcatch before exiting the
* stack frame iff JMPENV_PUSH was not called in that stack frame.
- *
- * The support for C++ try/throw causes a small loss of flexibility.
- * No longer is it possible to place the body of exception-protected
- * code in the same C function as JMPENV_PUSH &etc. Older code that
- * does this will continue to work with set/longjmp, but cannot use
- * C++ exceptions.
- *
- * GSAR 19970327
- * JPRIT 19980613 (C++ update)
+ * GSAR 97-03-27
*/
-#define JMP_NORMAL 0
-#define JMP_ABNORMAL 1 /* shouldn't happen */
-#define JMP_MYEXIT 2 /* exit */
-#define JMP_EXCEPTION 3 /* die */
-
-/* None of the JMPENV fields should be accessed directly.
- Please use the macros below! */
struct jmpenv {
struct jmpenv * je_prev;
- int je_stat; /* JMP_* reason for setjmp() */
- bool je_mustcatch; /* will need a new TRYBLOCK? */
- void (*je_jump) _((CPERLproto));
-};
-typedef struct jmpenv JMPENV;
-
-struct tryvtbl {
- /* [0] executed before JMPENV_POP
- [1] executed after JMPENV_POP
- (NULL pointers are OK) */
- char *try_context;
- void (*try_normal [2]) _((CPERLproto_ void*));
- void (*try_abnormal [2]) _((CPERLproto_ void*));
- void (*try_exception [2]) _((CPERLproto_ void*));
- void (*try_myexit [2]) _((CPERLproto_ void*));
+ Sigjmp_buf je_buf;
+ int je_ret; /* return value of last setjmp() */
+ bool je_mustcatch; /* longjmp()s must be caught locally */
};
-typedef struct tryvtbl TRYVTBL;
-typedef void (*tryblock_f) _((CPERLproto_ TRYVTBL *vtbl, void *locals));
-#define TRYBLOCK(mytry,vars) \
- (*tryblock_function)(PERL_OBJECT_THIS_ &mytry, &vars)
+typedef struct jmpenv JMPENV;
#ifdef OP_IN_REGISTER
#define OP_REG_TO_MEM opsave = op
#define OP_MEM_TO_REG NOOP
#endif
-#define JMPENV_TOPINIT(top) \
-STMT_START { \
- top.je_prev = NULL; \
- top.je_stat = JMP_ABNORMAL; \
- top.je_mustcatch = TRUE; \
- top_env = ⊤ \
-} STMT_END
-
-#define JMPENV_INIT(env, jmp) \
-STMT_START { \
- ((JMPENV*)&env)->je_prev = top_env; \
- ((JMPENV*)&env)->je_stat = JMP_NORMAL; \
- ((JMPENV*)&env)->je_jump = jmp; \
- OP_REG_TO_MEM; \
-} STMT_END
-
-#define JMPENV_TRY(env) \
-STMT_START { \
- OP_MEM_TO_REG; \
- ((JMPENV*)&env)->je_mustcatch = FALSE; \
- top_env = (JMPENV*)&env; \
-} STMT_END
-
-#define JMPENV_POP_JE(env) \
-STMT_START { \
- assert(top_env == (JMPENV*)&env); \
- top_env = ((JMPENV*)&env)->je_prev; \
-} STMT_END
-
-#define JMPENV_STAT(env) ((JMPENV*)&env)->je_stat
-
+#define dJMPENV JMPENV cur_env
+#define JMPENV_PUSH(v) \
+ STMT_START { \
+ cur_env.je_prev = top_env; \
+ OP_REG_TO_MEM; \
+ cur_env.je_ret = PerlProc_setjmp(cur_env.je_buf, 1); \
+ OP_MEM_TO_REG; \
+ top_env = &cur_env; \
+ cur_env.je_mustcatch = FALSE; \
+ (v) = cur_env.je_ret; \
+ } STMT_END
+#define JMPENV_POP \
+ STMT_START { top_env = cur_env.je_prev; } STMT_END
#define JMPENV_JUMP(v) \
STMT_START { \
- assert((v) != JMP_NORMAL); \
OP_REG_TO_MEM; \
- if (top_env->je_prev) { \
- top_env->je_stat = (v); \
- (*top_env->je_jump)(PERL_OBJECT_THIS); \
- } \
- if ((v) == JMP_MYEXIT) \
- PerlProc_exit(STATUS_NATIVE_EXPORT); \
- PerlIO_printf(PerlIO_stderr(), no_top_env); \
- PerlProc_exit(1); \
+ if (top_env->je_prev) \
+ PerlProc_longjmp(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
#define CATCH_GET (top_env->je_mustcatch)
#define CATCH_SET(v) (top_env->je_mustcatch = (v))
-
-
-
-/*******************************************************************
- * JMPENV_PUSH is the old depreciated API. See perl.c for examples
- * of the new API.
- */
-
-struct setjmpenv {
- /* move to scope.c once JMPENV_PUSH is no longer needed XXX */
- JMPENV je0;
- Sigjmp_buf je_buf;
-};
-typedef struct setjmpenv SETJMPENV;
-
-#define dJMPENV SETJMPENV cur_env
-
-extern void setjmp_jump();
-
-#define JMPENV_PUSH(v) \
- STMT_START { \
- JMPENV_INIT(cur_env, setjmp_jump); \
- PerlProc_setjmp(cur_env.je_buf, 1); \
- JMPENV_TRY(cur_env); \
- (v) = JMPENV_STAT(cur_env); \
- } STMT_END
-
-#define JMPENV_POP \
-STMT_START { \
- assert(top_env == (JMPENV*) &cur_env); \
- top_env = cur_env.je0.je_prev; \
-} STMT_END
-
+
projects / p5sagit/p5-mst-13.2.git / blobdiff