/* * Copyright (c) 1995, 1996, 1997, 1998, 1999 The University of Utah and * the Computer Systems Laboratory at the University of Utah (CSL). * * This file is part of Flick, the Flexible IDL Compiler Kit. * * Flick is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * Flick is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Flick; see the file COPYING. If not, write to * the Free Software Foundation, 59 Temple Place #330, Boston, MA 02111, USA. */ #include #include #include #include #include "khazana.h" void w_client_stub(pres_c_1 *pres, int stub_idx) { assert(pres); pres_c_stub *stub = &pres->stubs.stubs_val[stub_idx]; pres_c_client_stub *cstub = &stub->pres_c_stub_u.cstub; cast_def *cfunc = &pres->stubs_cast.cast_scope_val[cstub->c_func]; cast_func_type *cfunct = &cfunc->u.cast_def_u_u.func_type; struct mu_abort_block *mab; cast_stmt reaper_label; char *escape_label; mint_ref operation_itype; pres_c_inline operation_inline; int assumptions = RPCM_TRUSTED; /* XXX */ const char *emergency_return_string; if (cfunct->return_type->kind != CAST_TYPE_VOID) emergency_return_string = "return _return"; else emergency_return_string = "return"; emergency_return_value = cast_new_expr_name(emergency_return_string); reaper_label = cast_new_label( "_flick_reaper", cast_new_stmt_expr(emergency_return_value)); mab = new mu_abort_block(); mab->set_kind(MABK_THREAD); mab->begin(); khazana_target_mu_state must_target(the_state, (MUST_ENCODE | MUST_DEALLOCATE), 0, "client"); khazana_mu_state must_in(the_state, (MUST_ENCODE | MUST_DEALLOCATE | MUST_REQUEST), assumptions, "client"); /* Start the abort code */ mab->add_stmt( cast_new_stmt_expr( cast_new_expr_call_3( cast_new_expr_name( flick_asprintf("flick_%s_%s_error", pres->pres_context, must_in.which_stub)), cast_new_expr_name(must_in.get_encode_name()), cast_new_expr_name(must_in.get_be_name()), cast_new_expr_name(mab-> use_current_label())))); /* The order of the musts below is crucial to the abort code working properly */ /* Build the target object marshaling code. */ /* Set the state of the stub. This is used by error handlers and possibly other things in the future */ must_target.add_stmt(must_target. change_stub_state(FLICK_STATE_PROLOGUE)); must_target.add_stmt(must_target. change_stub_state(FLICK_STATE_MARSHAL)); must_target.abort_block = mab; must_target.arglist = new mu_state_arglist("params"); must_target.arglist->add("params", "object"); must_target.mu_func_params(cstub->c_func, cstub->target_itype, cstub->target_i); must_target.mu_end(); /* Build the client object marshaling code. */ /* XXX --- Not yet supported. */ if (cstub->client_i) { warn("This back end doesn't support client references."); } /* Build the parameter marshal/unmarshal code. */ must_in.abort_block = mab; remove_idl_and_interface_ids(pres, cstub->request_itype, cstub->request_i, &operation_itype, &operation_inline); must_in.mu_func_params(cstub->c_func, operation_itype, operation_inline); must_in.mu_end(); escape_label = mab->use_current_label(); struct mu_abort_block *out_mab; /* If the stub is oneway we don't want to have unmarshaling abort code left around, so we catch it in a dummy context. */ if (cstub->op_flags & PRES_C_STUB_OP_FLAG_ONEWAY) { out_mab = new mu_abort_block(); out_mab->set_kind(MABK_THREAD); out_mab->begin(); } else out_mab = mab; khazana_mu_state must_out(the_state, (MUST_DECODE | MUST_ALLOCATE | MUST_REPLY), assumptions, "client", KHAZANA_NO_SWAP); /* Set up the argument list to catch parameter names we may need. */ must_out.arglist = new mu_state_arglist("params"); must_out.arglist->add("params", "environment"); must_out.abort_block = out_mab; must_out.add_stmt(must_out.change_stub_state(FLICK_STATE_UNMARSHAL)); must_out.current_span = new mu_msg_span; must_out.current_span->set_kind(MSK_SEQUENTIAL); must_out.current_span->begin(); remove_idl_and_interface_ids(pres, cstub->reply_itype, cstub->reply_i, &operation_itype, &operation_inline); remove_operation_id(pres, operation_itype, operation_inline, &operation_itype, &operation_inline); must_out.mu_func_params(cstub->c_func, operation_itype, operation_inline); must_out.mu_end(); /* Collapse the span tree and commit the values */ must_out.current_span->end(); must_out.current_span->collapse(); must_out.current_span->commit(); khazana_mu_state must_swap(the_state, (MUST_DECODE | MUST_ALLOCATE | MUST_REPLY), assumptions, "client", KHAZANA_SWAP); /* Set up the argument list to catch parameter names we may need. */ must_swap.arglist = new mu_state_arglist("params"); must_swap.arglist->add("params", "environment"); must_swap.abort_block = out_mab; must_swap.add_stmt(must_swap.change_stub_state(FLICK_STATE_UNMARSHAL)); must_swap.current_span = new mu_msg_span; must_swap.current_span->set_kind(MSK_SEQUENTIAL); must_swap.current_span->begin(); must_swap.mu_func_params(cstub->c_func, operation_itype, operation_inline); must_swap.mu_end(); must_swap.current_span->end(); must_swap.current_span->collapse(); must_swap.current_span->commit(); mab->end(); mab->set_reaper_label(reaper_label); /* Remove any unneeded abort code */ mab->rollback(); /* Start writing the client stub. */ cast_w_func_type(cfunc->name, cfunct, 0); w_printf("\n{\n"); w_i_printf(1, "FLICK_BUFFER *_stream;\n"); if (cfunct->return_type->kind != CAST_TYPE_VOID) { /* * Initialize `_return' to be zero. This eliminates compiler * warnings about returning uninitialized data. */ cast_expr init_expr = cast_new_expr_assign_to_zero( cast_new_expr_name("_return"), cfunct->return_type, &(pres->cast) ); w_indent(1); cast_w_type(cast_new_scoped_name("_return", NULL), cfunct->return_type, 1); w_printf(";\n"); w_printf("\n"); cast_w_stmt(cast_new_stmt_expr(init_expr), 1); } else w_printf("\n"); /* Get the target (object) expression. */ cast_expr target_expr; cast_type target_type; int gotarg = must_target.arglist->getargs("params", "object", &target_expr, &target_type); assert(gotarg);assert(target_expr);assert(target_type); #if 0 /* * XXX --- #if 0'ed out because this code assumes that 0 is a null * object reference. That's for the presentation generator to decide! * We should do this: `if (flick__object_is_nil(...)) ...'. */ /* Guard against null target object references. */ cast_w_stmt( cast_new_if( cast_new_binary_expr(CAST_BINARY_EQ, target_expr, cast_new_expr_lit_int(0, 0) ), must_in.make_error(FLICK_ERROR_INVALID_TARGET), 0), 1); #endif w_i_printf(1, "flick_%s_client_start_encode();\n", must_in.get_be_name()); cast_w_stmt(must_target.c_block, 1); /* Output the general marshaling code. */ cast_w_stmt(must_in.c_block, 1); w_i_printf(1, "flick_%s_client_end_encode();\n", must_in.get_be_name()); cast_w_stmt(must_in.change_stub_state(FLICK_STATE_SEND), 1); /* * If the operation is oneway, only use send_request, and end the * function. */ w_i_printf(1, "flick_%s_client_set_response_expected(%d);\n", must_in.get_be_name(), ((cstub->op_flags & PRES_C_STUB_OP_FLAG_ONEWAY) ? 0 : 1)); cast_expr obj_boa_in = cast_new_expr_sel( cast_new_unary_expr( CAST_UNARY_DEREF, cast_new_expr_sel( cast_new_unary_expr( CAST_UNARY_DEREF, target_expr), cast_new_scoped_name("boa", NULL))), cast_new_scoped_name("in", NULL)); cast_expr obj_boa_out = cast_new_expr_sel( cast_new_unary_expr( CAST_UNARY_DEREF, cast_new_expr_sel( cast_new_unary_expr( CAST_UNARY_DEREF, target_expr), cast_new_scoped_name("boa", NULL))), cast_new_scoped_name("out", NULL)); if (cstub->op_flags & PRES_C_STUB_OP_FLAG_ONEWAY) { cast_stmt send_stmt = cast_new_if( cast_new_unary_expr( CAST_UNARY_LNOT, cast_new_expr_call_2( cast_new_expr_name( "flick_client_send_request"), target_expr, obj_boa_in)), cast_new_stmt_expr(cast_new_expr_call_2( cast_new_expr_name("flick_stub_error"), cast_new_expr_name( "FLICK_ERROR_COMMUNICATION"), cast_new_expr_name( escape_label))), 0 /* no else clause */); cast_w_stmt(send_stmt, 1); w_i_printf(1, "%s;\n", emergency_return_string); /* write out the abort stuff */ cast_w_stmt(mab->get_block_label(), 1); cast_w_stmt(reaper_label, 1); w_printf("}\n\n"); return; } cast_stmt rpc_stmt = cast_new_if( cast_new_binary_expr( CAST_BINARY_LOR, cast_new_unary_expr( CAST_UNARY_LNOT, cast_new_expr_call_2( cast_new_expr_name( "flick_client_send_request"), target_expr, obj_boa_in)), cast_new_unary_expr( CAST_UNARY_LNOT, cast_new_expr_call_2( cast_new_expr_name( "flick_client_get_reply"), target_expr, obj_boa_out))), cast_new_stmt_expr(cast_new_expr_call_2( cast_new_expr_name( flick_asprintf("flick_stub_error", must_in.pres->pres_context)), cast_new_expr_name("FLICK_ERROR_COMMUNICATION"), cast_new_expr_name(escape_label))), 0 /* no else clause */); cast_w_stmt(rpc_stmt, 1); w_i_printf(1, "flick_%s_client_start_decode();\n", must_in.get_be_name()); cast_stmt decode_stmt = cast_new_if( cast_new_expr_call_0( cast_new_expr_name("flick_cdr_swap")), must_swap.c_block, must_out.c_block); cast_w_stmt(decode_stmt, 1); w_i_printf(1, "flick_%s_client_end_decode();\n", must_in.get_be_name()); w_i_printf(1, "%s;\n", emergency_return_string); /* write out the abort stuff */ cast_w_stmt(mab->get_block_label(), 1); cast_w_stmt(reaper_label, 1); w_printf("}\n\n"); } void w_send_stub(pres_c_1 *pres, int stub_idx) { assert(pres); pres_c_stub *stub = &pres->stubs.stubs_val[stub_idx]; assert(stub->kind == PRES_C_SEND_STUB); pres_c_msg_stub *sstub = &stub->pres_c_stub_u.send_stub; cast_def *cfunc = &pres->stubs_cast.cast_scope_val[sstub->c_func]; cast_func_type *cfunct = &cfunc->u.cast_def_u_u.func_type; struct mu_abort_block *mab; cast_stmt reaper_label; int assumptions = RPCM_TRUSTED; /* XXX */ const char *emergency_return_string = "return"; char *escape_label; assert(cfunct->return_type->kind == CAST_TYPE_VOID); emergency_return_value = cast_new_expr_name(emergency_return_string); reaper_label = cast_new_label( "_flick_reaper", cast_new_stmt_expr(emergency_return_value)); mab = new mu_abort_block(); mab->set_kind(MABK_THREAD); mab->begin(); khazana_target_mu_state must_target(the_state, MUST_ENCODE | MUST_DEALLOCATE, 0, "send"); khazana_mu_state must_send(the_state, MUST_ENCODE | MUST_DEALLOCATE, assumptions, "send"); /* Start the abort code */ int gotarg = 0; mab->add_stmt( cast_new_stmt_expr( cast_new_expr_call_3( cast_new_expr_name( flick_asprintf("flick_%s_%s_error", pres->pres_context, must_send.which_stub)), cast_new_expr_name(must_send. get_encode_name()), cast_new_expr_name(must_send.get_be_name()), cast_new_expr_name(mab-> use_current_label())))); /* The order of the musts below is crucial to the abort code working properly */ /* Build the target object marshaling code. */ must_target.abort_block = mab; must_target.arglist = new mu_state_arglist("params"); must_target.arglist->add("params", "object"); must_target.mu_func_params(sstub->c_func, sstub->target_itype, sstub->target_i); must_target.mu_end(); /* Build the code. */ /* Set up the argument list to catch the parameter names we need. */ must_send.arglist = new mu_state_arglist("params"); must_send.arglist->add("params", "environment"); must_send.arglist->add("params", "return"); must_send.arglist->add("params", "invocation_id"); must_send.arglist->add("params", "client"); must_send.arglist->add("params", "message"); must_send.abort_block = mab; must_send.mu_func_params(sstub->c_func, sstub->msg_itype, sstub->msg_i); must_send.mu_end(); escape_label = mab->use_current_label(); mab->end(); mab->set_reaper_label(reaper_label); /* Remove any unneeded abort code */ mab->rollback(); /* Start writing the client stub. */ cast_w_func_type(cfunc->name, cfunct, 0); w_printf("\n{\n"); /* XXX - These are required in order have the stub_state accessible for error handling. */ w_i_printf(1, "FLICK_BUFFER __stream;\n"); w_i_printf(1, "FLICK_BUFFER *_stream = &__stream;\n"); /* * To be fully ``correct'', we should actually output the * blocks of code we just generated for the target and stub * body. As it turns out, though, everything that we need to * do (marshal the target, insert the invocation ID, marshal * the client) is best done in the runtime anyway, not here. */ #if 0 w_i_printf(1, "flick_%s_send_start_encode();\n", must_send.get_be_name()); cast_w_stmt(must_target.c_block, 1); cast_w_stmt(must_send.c_block, 1); w_i_printf(1, "flick_%s_send_end_encode();\n", must_send.get_be_name()); #endif cast_w_stmt(must_send.change_stub_state(FLICK_STATE_SEND), 1); w_i_printf(1, "if (!flick_send_%s_msg(", (sstub->request)? "request" : "reply"); cast_expr expr, client_expr, target_expr; cast_type type; /* Get the client and target names separately. */ gotarg = must_send.arglist->getargs("params", "client", &client_expr, &type); assert(gotarg);assert(client_expr);assert(type); gotarg = must_target.arglist->getargs("params", "object", &target_expr, &type); assert(gotarg);assert(target_expr);assert(type); cast_w_expr((sstub->request)? target_expr : client_expr, 0); w_printf(", (flick_msg_t) "); gotarg = must_send.arglist->getargs("params", "message", &expr, &type); assert(gotarg);assert(expr);assert(type); cast_w_expr(expr, 0);w_printf(", "); gotarg = must_send.arglist->getargs("params", "invocation_id", &expr, &type); assert(gotarg);assert(expr);assert(type); cast_w_expr(expr, 0);w_printf(", "); cast_w_expr((sstub->request)? client_expr : target_expr, 0); w_printf("))\n"); w_i_printf(2, "flick_stub_error(FLICK_ERROR_COMMUNICATION, %s);\n", escape_label); w_i_printf(1, "%s;\n", emergency_return_string); /* write out the abort stuff */ cast_w_stmt(mab->get_block_label(), 1); cast_w_stmt(reaper_label, 1); w_printf("}\n\n"); } /* End of file. */