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Diffstat (limited to 'TAO/tao/invoke.cpp')
| -rw-r--r-- | TAO/tao/invoke.cpp | 376 |
1 files changed, 0 insertions, 376 deletions
diff --git a/TAO/tao/invoke.cpp b/TAO/tao/invoke.cpp deleted file mode 100644 index 5ab247b2b53..00000000000 --- a/TAO/tao/invoke.cpp +++ /dev/null @@ -1,376 +0,0 @@ -// @(#)invoke.cpp 1.3 95/09/24 -// Copyright 1994-1995 by Sun Microsystems Inc. -// All Rights Reserved -// -// IIOP stub support for static and dynamic invocation -// -// This file holds DII support, and an analagous interpreter that let -// static stubs be very small. It's specific to objrefs with -// IIOP::Profile. -// -// NOTE: this may someday be moved within an IIOP class so that the -// public stub interface is completely independent of ORB/protocol -// internals. -// -// THREADING NOTE: Code below this point is of course thread-safe (at -// least on supported threaded platforms), so the caller of these -// routines need only ensure that the data being passed in is not -// being modified by any other thread. -// -// As an _experiment_ (to estimate the performance cost) remote calls -// are currently deemed "cancel-safe". That means that they can be -// called by threads when they're in asynchronous cancellation mode. -// The only effective way to do this is to disable async cancellation -// for the duration of the call. There are numerous rude interactions -// with code generators for C++ ... cancellation handlers just do -// normal stack unwinding like exceptions, but exceptions are purely -// synchronous and sophisticated code generators rely on that to -// generate better code, which in some cases may be very hard to -// unwind. - -#include "tao/corba.h" - -class ACE_Synchronous_Cancellation_Required - // = TITLE - // ACE_Synchronous_Cancellation_Required - // - // = DESCRIPTION - // Stick one of these at the beginning of a block that can't - // support asynchronous cancellation, and which must be - // cancel-safe. - // - // = EXAMPLE - // somefunc() - // { - // ACE_Synchronous_Cancellation_Required NOT_USED; - // ... - // } -{ -public: - // These should probably be in a separate inline file, but they're - // only used within this one file right now, and we always want them - // inlined, so here they sit. - ACE_Synchronous_Cancellation_Required (void) - { - ACE_OS::thr_setcanceltype (THR_CANCEL_DEFERRED, &old_type_); - } - - ~ACE_Synchronous_Cancellation_Required (void) - { - int dont_care; - ACE_OS::thr_setcanceltype(old_type_, &dont_care); - } -private: - int old_type_; -}; - -// "stub interpreter" for static stubs. IDL compiler (or human -// equivalent thereof :-) should just dump a read-only description of -// the call into "calldata" and do varargs calls to this routine, -// which does all the work. -// -// NOTE: This routine includes stub interpreter code, upon which a -// patent application is pending. - -void -IIOP_Object::do_call (CORBA::Environment &env, // exception reporting - const TAO_Call_Data *info, // call description - ...) // ... any parameters - -{ - ACE_Synchronous_Cancellation_Required NOT_USED; - - TAO_GIOP_Invocation call (this, - info->opname, - info->is_roundtrip); - - // We may need to loop through here more than once if we're - // forwarded to some other object reference. - // - // NOTE: A quality-of-service policy may be useful to establish - // here, specifically one controlling how many times the call is - // reissued before failing the call on the assumption that something - // is broken. - // - // NOTE: something missing is a dynamic way to change the policy of - // whether to issue LocateRequest messages or not. This code uses a - // simple, fixed policy: never use LocateRequest messages. - // - for (;;) - { - // Start the call by constructing the request message header. - - env.clear (); - call.start (env); - - if (env.exception ()) - { - dexc (env, "do_call, start request message"); - return; - } - - // Now, put all "in" and "inout" parameters into the request - // message body. - // - // Some "inout" data have an extra level of indirection, - // specified by the language mapping's memory allocation - // policies ... the indirection only shows up here when it's - // needed later for allocating "out" memory, otherwise there's - // just one indirection. - - u_int i; - const TAO_Param_Data *pdp; - va_list param_vector; - - va_start (param_vector, info); - - for (i = 0, pdp = info->params; - i < info->param_count; - i++, pdp++) - { - void *ptr = va_arg (param_vector, void *); - - if (pdp->mode == PARAM_IN) - call.put_param (pdp->tc, ptr, env); - else if (pdp->mode == PARAM_INOUT) - { - if (pdp->value_size == 0) - call.put_param (pdp->tc, ptr, env); - else - call.put_param (pdp->tc, *(void **)ptr, env); - } - - if (env.exception ()) - { - dexc (env, "do_call, put request parameter"); - return; - } - } - va_end (param_vector); - - // Make the call ... blocking for response if needed. Note that - // "oneway" calls can't return any exceptions except system - // ones. - - TAO_GIOP_ReplyStatusType status; - CORBA::ExceptionList exceptions; - - exceptions.length = exceptions.maximum = info->except_count; - exceptions.buffer = (CORBA::TypeCode_ptr *) info->excepts; - - status = call.invoke (exceptions, env); - - exceptions.buffer = 0; // don't free it - - if (env.exception ()) - { - dexc (env, "do_call, invoke"); - return; - } - if (!info->is_roundtrip - || status == TAO_GIOP_SYSTEM_EXCEPTION - || status == TAO_GIOP_USER_EXCEPTION) - return; - - // Now, get all the "return", "out", and "inout" parameters from - // the response message body. - - if (status == TAO_GIOP_NO_EXCEPTION) - { - va_start (param_vector, info); - for (i = 0, pdp = info->params; - i < info->param_count; - i++, pdp++) - { - void *ptr = va_arg (param_vector, void *); - - if (pdp->mode == PARAM_RETURN - || pdp->mode == PARAM_OUT - || pdp->mode == PARAM_INOUT) - { - // The language mapping's memory allocation policy - // says that some data is heap-allocated. This - // interpreter is told about the relevant policy by - // whoever built the operation description (e.g. the - // IDL compiler) so it doesn't have to know the - // policy associated with a particular language - // binding (e.g. C/C++ differ, and C++ even has - // different policies for different kinds of - // structures). - if (pdp->value_size == 0) - call.get_value (pdp->tc, ptr, env); - else - { - // assert (value_size == tc->size()); - *(void **)ptr = new CORBA::Octet [pdp->value_size]; - call.get_value (pdp->tc, *(void **)ptr, env); - } - - if (env.exception ()) - { - dexc (env, "do_call, get reply parameter"); - return; - } - } - } - va_end (param_vector); - return; - } - - // ... or maybe this request got forwarded to someplace else; send - // the request there instead. - assert (status == TAO_GIOP_LOCATION_FORWARD); - } -} - -// DII analogue of the above. Differs in how the vararg calling -// convention is implemented -- DII doesn't use the normal call stack -// with its implicit typing, but iinstead uses heap-based arguments -// with explicit typing. - -void -IIOP_Object::do_dynamic_call (const char *opname, // operation name - CORBA::Boolean is_roundtrip, // results required? - CORBA::NVList_ptr args, // parameters - CORBA::NamedValue_ptr result, // result - CORBA::Flags flags, // per-call flag (one!) - CORBA::ExceptionList &exceptions, // possible user exceptions - CORBA::Environment &env) // exception reporting -{ - ACE_Synchronous_Cancellation_Required NOT_USED; - - TAO_GIOP_Invocation call (this, opname, is_roundtrip); - - // Loop as needed for forwarding; see above. - - for (;;) - { - // Start the call by constructing the request message header. - env.clear (); - call.start (env); - - if (env.exception ()) - { - dexc (env, "do_call, start request message"); - return; - } - - // Now, put all "in" and "inout" parameters into the request - // message body. - - u_int i; - - for (i = 0; i < args->count (); i++) - { - CORBA::NamedValue_ptr value = args->item (i); - - if (value->flags () == CORBA::ARG_IN - || value->flags () == CORBA::ARG_INOUT) - { - call.put_param (value->value ()->type (), - (void *) value->value ()->value (), env); - if (env.exception ()) - { - dexc (env, "do_dynamic_call, put request parameter"); - return; - } - } - } - - // Make the call ... blocking for response if needed. Note that - // "oneway" calls can't return any exceptions except system ones. - - TAO_GIOP_ReplyStatusType status; - - status = call.invoke (exceptions, env); - if (env.exception ()) - { - dexc (env, "do_dynamic_call, invoke"); - return; - } - if (!is_roundtrip - || status == TAO_GIOP_SYSTEM_EXCEPTION - || status == TAO_GIOP_USER_EXCEPTION) - return; - - // Now, get all the "return", "out", and "inout" parameters from the - // response message body ... return parameter is first, the rest are - // in the order defined in the IDL spec (which is also the order that - // DII users are required to use). - - if (status == TAO_GIOP_NO_EXCEPTION) - { - if (result != 0) - { - // If caller didn't set OUT_LIST_MEMORY flag, allocate - // memory for return value ... - - if (!(flags & CORBA::OUT_LIST_MEMORY)) - { - CORBA::TypeCode_ptr tcp; - size_t size; - - tcp = result->value ()->type (); - size = tcp->size (env); - dexc (env, "do_dynamic_call, get result size"); - - if (size != 0) - { - void *ptr = new CORBA::Octet [size]; - - tcp->AddRef (); - result->value ()->replace (tcp, ptr, - CORBA::B_TRUE, env); - dexc (env, "do_dynamic_call, set result mem"); - } - } - - call.get_value (result->value ()->type (), - (void *) result->value ()->value (), env); - } - - for (i = 0; i < args->count (); i++) - { - CORBA::NamedValue_ptr value = args->item (i); - - if (value->flags () == CORBA::ARG_OUT - || value->flags () == CORBA::ARG_INOUT) - { - // If caller didn't set OUT_LIST_MEMORY flag, allocate - // memory for this parameter ... - if (!(flags & CORBA::OUT_LIST_MEMORY)) - { - CORBA::TypeCode_ptr tcp; - size_t size; - - tcp = value->value ()->type (); - size = tcp->size (env); - dexc (env, "do_dynamic_call, get param size"); - - if (size != 0) - { - void *ptr = new CORBA::Octet [size]; - - tcp->AddRef (); - value->value ()->replace (tcp, ptr, - CORBA::B_TRUE, env); - dexc (env, "do_dynamic_call, set result mem"); - } - } - - call.get_value (value->value ()->type (), - (void *) value->value ()->value (), env); - if (env.exception ()) - { - dexc (env, "do_dynamic_call, get response parameter"); - return; - } - } - } - return; - } - - // ... or maybe this request got forwarded to someplace else. - assert (status == TAO_GIOP_LOCATION_FORWARD); - } -} |