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-rw-r--r--generic/tclBasic.c2
-rw-r--r--generic/tclCompCmdsSZ.c45
-rw-r--r--generic/tclCompile.c7
-rw-r--r--generic/tclCompile.h4
-rw-r--r--generic/tclExecute.c71
-rw-r--r--generic/tclInt.h3
6 files changed, 121 insertions, 11 deletions
diff --git a/generic/tclBasic.c b/generic/tclBasic.c
index 7c02706..e355229 100644
--- a/generic/tclBasic.c
+++ b/generic/tclBasic.c
@@ -259,7 +259,7 @@ static const CmdInfo builtInCmds[] = {
{"variable", Tcl_VariableObjCmd, TclCompileVariableCmd, NULL, CMD_IS_SAFE},
{"while", Tcl_WhileObjCmd, TclCompileWhileCmd, TclNRWhileObjCmd, CMD_IS_SAFE},
{"yield", NULL, TclCompileYieldCmd, TclNRYieldObjCmd, CMD_IS_SAFE},
- {"yieldto", NULL, NULL, TclNRYieldToObjCmd, CMD_IS_SAFE},
+ {"yieldto", NULL, TclCompileYieldToCmd, TclNRYieldToObjCmd, CMD_IS_SAFE},
/*
* Commands in the OS-interface. Note that many of these are unsafe.
diff --git a/generic/tclCompCmdsSZ.c b/generic/tclCompCmdsSZ.c
index 0f2790f..5c132b4 100644
--- a/generic/tclCompCmdsSZ.c
+++ b/generic/tclCompCmdsSZ.c
@@ -3447,6 +3447,51 @@ TclCompileYieldCmd(
/*
*----------------------------------------------------------------------
*
+ * TclCompileYieldToCmd --
+ *
+ * Procedure called to compile the "yieldto" command.
+ *
+ * Results:
+ * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
+ * evaluation to runtime.
+ *
+ * Side effects:
+ * Instructions are added to envPtr to execute the "yieldto" command at
+ * runtime.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileYieldToCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ DefineLineInformation; /* TIP #280 */
+ Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr);
+ int i;
+
+ if (parsePtr->numWords < 2) {
+ return TCL_ERROR;
+ }
+
+ OP( NS_CURRENT);
+ for (i = 1 ; i < parsePtr->numWords ; i++) {
+ CompileWord(envPtr, tokenPtr, interp, i);
+ tokenPtr = TokenAfter(tokenPtr);
+ }
+ OP4( LIST, i);
+ OP( YIELD_TO_INVOKE);
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
* CompileUnaryOpCmd --
*
* Utility routine to compile the unary operator commands.
diff --git a/generic/tclCompile.c b/generic/tclCompile.c
index bd97e3e..f75ac83 100644
--- a/generic/tclCompile.c
+++ b/generic/tclCompile.c
@@ -631,6 +631,13 @@ InstructionDesc const tclInstructionTable[] = {
* arguments (similar to invokeStk).
* Stack: ... "nextto" className arg3 arg4 -- argN => ... result */
+ {"yieldToInvoke", 1, 0, 0, {OPERAND_NONE}},
+ /* Makes the current coroutine yield the value at the top of the
+ * stack, invoking the given command/args with resolution in the given
+ * namespace (all packed into a list), and places the list of values
+ * that are the response back on top of the stack when it resumes.
+ * Stack: ... [list ns cmd arg1 ... argN] => ... resumeList */
+
{NULL, 0, 0, 0, {OPERAND_NONE}}
};
diff --git a/generic/tclCompile.h b/generic/tclCompile.h
index b047855..7994e2c 100644
--- a/generic/tclCompile.h
+++ b/generic/tclCompile.h
@@ -793,8 +793,10 @@ typedef struct ByteCode {
#define INST_TCLOO_NEXT 179
#define INST_TCLOO_NEXT_CLASS 180
+#define INST_YIELD_TO_INVOKE 181
+
/* The last opcode */
-#define LAST_INST_OPCODE 180
+#define LAST_INST_OPCODE 181
/*
* Table describing the Tcl bytecode instructions: their name (for displaying
diff --git a/generic/tclExecute.c b/generic/tclExecute.c
index ac0ea12..575f227 100644
--- a/generic/tclExecute.c
+++ b/generic/tclExecute.c
@@ -2494,9 +2494,12 @@ TEBCresume(
TRACE_APPEND(("\n"));
goto processExceptionReturn;
- case INST_YIELD: {
- CoroutineData *corPtr = iPtr->execEnvPtr->corPtr;
+ {
+ CoroutineData *corPtr;
+ int yieldParameter;
+ case INST_YIELD:
+ corPtr = iPtr->execEnvPtr->corPtr;
TRACE(("%.30s => ", O2S(OBJ_AT_TOS)));
if (!corPtr) {
TRACE_APPEND(("ERROR: yield outside coroutine\n"));
@@ -2510,11 +2513,63 @@ TEBCresume(
}
#ifdef TCL_COMPILE_DEBUG
- TRACE_WITH_OBJ(("yield, result="), iPtr->objResultPtr);
- if (traceInstructions) {
- fprintf(stdout, "\n");
+ if (tclTraceExec >= 2) {
+ if (traceInstructions) {
+ TRACE_APPEND(("YIELD...\n"));
+ } else {
+ fprintf(stdout, "%d: (%u) yielding value \"%.30s\"\n",
+ iPtr->numLevels, (unsigned)(pc - codePtr->codeStart),
+ Tcl_GetString(OBJ_AT_TOS));
+ }
+ fflush(stdout);
+ }
+#endif
+ yieldParameter = 0;
+ Tcl_SetObjResult(interp, OBJ_AT_TOS);
+ goto doYield;
+
+ case INST_YIELD_TO_INVOKE:
+ corPtr = iPtr->execEnvPtr->corPtr;
+ valuePtr = OBJ_AT_TOS;
+ if (!corPtr) {
+ TRACE(("[%.30s] => ERROR: yield outside coroutine\n",
+ O2S(valuePtr)));
+ Tcl_SetObjResult(interp, Tcl_NewStringObj(
+ "yieldto can only be called in a coroutine", -1));
+ DECACHE_STACK_INFO();
+ Tcl_SetErrorCode(interp, "TCL", "COROUTINE", "ILLEGAL_YIELD",
+ NULL);
+ CACHE_STACK_INFO();
+ goto gotError;
+ }
+
+#ifdef TCL_COMPILE_DEBUG
+ if (tclTraceExec >= 2) {
+ if (traceInstructions) {
+ TRACE(("[%.30s] => YIELD...\n", O2S(valuePtr)));
+ } else {
+ /* FIXME: What is the right thing to trace? */
+ fprintf(stdout, "%d: (%u) yielding to [%.30s]\n",
+ iPtr->numLevels, (unsigned)(pc - codePtr->codeStart),
+ Tcl_GetString(valuePtr));
+ }
+ fflush(stdout);
}
#endif
+
+ /*
+ * Install a tailcall record in the caller and continue with the
+ * yield. The yield is switched into multi-return mode (via the
+ * 'yieldParameter').
+ */
+
+ Tcl_IncrRefCount(valuePtr);
+ iPtr->execEnvPtr = corPtr->callerEEPtr;
+ TclSetTailcall(interp, valuePtr);
+ iPtr->execEnvPtr = corPtr->eePtr;
+ yieldParameter = (PTR2INT(NULL)+1); /*==CORO_ACTIVATE_YIELDM*/
+
+ doYield:
/* TIP #280: Record the last piece of info needed by
* 'TclGetSrcInfoForPc', and push the frame.
*/
@@ -2529,11 +2584,8 @@ TEBCresume(
pc++;
cleanup = 1;
TEBC_YIELD();
-
- Tcl_SetObjResult(interp, OBJ_AT_TOS);
TclNRAddCallback(interp, TclNRCoroutineActivateCallback, corPtr,
- INT2PTR(0), NULL, NULL);
-
+ INT2PTR(yieldParameter), NULL, NULL);
return TCL_OK;
}
@@ -2553,6 +2605,7 @@ TEBCresume(
}
#ifdef TCL_COMPILE_DEBUG
+ /* FIXME: What is the right thing to trace? */
{
register int i;
diff --git a/generic/tclInt.h b/generic/tclInt.h
index 7932a58..6ddb015 100644
--- a/generic/tclInt.h
+++ b/generic/tclInt.h
@@ -3688,6 +3688,9 @@ MODULE_SCOPE int TclCompileWhileCmd(Tcl_Interp *interp,
MODULE_SCOPE int TclCompileYieldCmd(Tcl_Interp *interp,
Tcl_Parse *parsePtr, Command *cmdPtr,
struct CompileEnv *envPtr);
+MODULE_SCOPE int TclCompileYieldToCmd(Tcl_Interp *interp,
+ Tcl_Parse *parsePtr, Command *cmdPtr,
+ struct CompileEnv *envPtr);
MODULE_SCOPE int TclCompileBasic0ArgCmd(Tcl_Interp *interp,
Tcl_Parse *parsePtr, Command *cmdPtr,
struct CompileEnv *envPtr);
generated by cgit v0.12 at 2024-11-05 08:42:37 (GMT)