src/simix/smx_context_base.c
src/simix/smx_user.c
src/simix/smx_smurf.c
+ src/replay/replay.h
+ src/replay/replay.c
+ src/replay/state_machine_context.c
+ src/replay/replay_trace_reader.c
)
set(MSG_SRC
if(enable_smpi)
add_subdirectory(${CMAKE_HOME_DIRECTORY}/examples/smpi)
endif(enable_smpi)
+
+add_subdirectory(${CMAKE_HOME_DIRECTORY}/src/replay)
XBT_PUBLIC(unsigned int) SIMIX_req_sem_acquire_any(xbt_dynar_t sems);
XBT_PUBLIC(int) SIMIX_req_sem_get_capacity(smx_sem_t sem);
+/* functions to let the state machine context factory mess with simix flow */
+XBT_PUBLIC(void*) SIMIX_request_get_result(int id);
+XBT_PUBLIC(int) SIMIX_request_last_id(void);
+
SG_END_DECL()
#endif /* _SIMIX_SIMIX_H */
--- /dev/null
+cmake_minimum_required(VERSION 2.6)
+
+set(EXECUTABLE_OUTPUT_PATH "${CMAKE_CURRENT_BINARY_DIR}")
+
+add_executable(replay replay_MPI.c)
+
+### Add definitions for compile
+target_link_libraries(replay simgrid m )
+
+### Get our action files in the archive
+#set(EXTRA_DIST ${EXTRA_DIST}
+# examples/msg/actions/actions_allReduce.txt
+# examples/msg/actions/actions_barrier.txt
+# examples/msg/actions/actions_bcast.txt
+# examples/msg/actions/actions_reduce.txt
+# examples/msg/actions/actions_split_p0.txt
+# examples/msg/actions/actions_split_p1.txt
+# examples/msg/actions/actions.txt
+# examples/msg/actions/actions_with_isend.txt
+# )
\ No newline at end of file
--- /dev/null
+This directory constitutes an attempt to code a new trace replayer for
+MPI actions, aiming at maximal performances. Modifying it is not for
+faint of heart, since it could be compared to a mixure of the assembly
+and basic programming philosophy (in worse) reserved to SimGrid experts.
+
+Shiny side: glance at interface
+===============================
+
+It uses a new simix context factory: state_machine. Each user process
+is a state machine. There is no system mystery such as pthread or
+ucontextes to save its stack. As a result, there is no stack. Each
+user process only have a user-provided structure describing its state,
+and only compute its next state based on that. Your main() can be as
+simple as:
+
+ #include "replay.h"
+
+ int main() {
+ SG_replay_init(&argc,argv);
+ SG_replay_set_functions(init_fun, run_fun, fini_fun);
+ SG_replay("platform.xml","deployment.xml");
+ return 0;
+ }
+
+ * init_fun: user function in charge of creating the structure for
+ each process in the simulation.
+ * run_fun: user function called each time that a process must run. It
+ takes as first argument the structure describing the
+ current process.
+ * fini_fun: user function in charge of freeing the memory allocated to
+ the structure describing a process.
+
+This way of organizing the code saves a *huge amount* of memory
+(regular contextes have 128kb stacks per user process, threads are
+even more expensive) and greatly speeds things up (there is absolutely
+no nothing to ask to the system, and everything can be done in user
+space).
+
+A simple to use and efficient trace parser is also provided:
+ /* constructor/destructor */
+ replay_trace_reader_t replay_trace_reader_new(const char*filename);
+ void replay_trace_reader_free(replay_trace_reader_t *reader);
+ /* get a new event. Don't free the content, strdup what you want to
+ keep after next call to reader_get() */
+ const char * const*replay_trace_reader_get(replay_trace_reader_t r);
+ /* return a "file:pos" description of the last thing we read. */
+ const char *replay_trace_reader_position(replay_trace_reader_t r);
+Check replay_trace_reader.c for souce code, and replay_MPI.c for
+example of use.
+
+
+
+Dark side: restrictions on user code
+====================================
+
+The incredible performance of this approach comes at a price: using
+SimGrid this way is a *real* pain in the ass. You cannot use MSG nor
+GRAS nor SMPI nor nothing (because none of these interfaces were coded
+with the *extrem* requirement of the state_machine in mind), and you
+can only rely on SIMIX. From SIMIX, you can only use requests (ie, the
+SIMIX_req_* functions). Moreover, you must know that each blocking
+request will result in an interruption of your execution flow.
+
+Let's take an example: If your code contains:
+ smx_action_t act = SIMIX_req_comm_isend(......);
+ SIMIX_req_comm_wait(act);
+ SIMIX_req_comm_destroy(act);
+
+The execution flow is interrupted brutally somewhere within
+SIMIX_req_comm_isend(), the variable act will never be set (and any
+code written after the first line is discarded).
+
+Indeed each SIMIX syscall results in an interruption of the calling
+process, but in state_machine there is only one system stack and the
+whole state describing the process is in the structure describing it.
+So, when we need to remove one process from the system, to pause it,
+we do it the hard way: the stack [of maestro] is restored to the state
+in which maestro put it, whatever what the user process put on it.
+
+In short, each time simix wants to interrupt a process, state_machine
+does a longjmp(2) to the point just before calling the user code. As a
+result, each time you do a syscall, your stack is destroyed to restore
+it in the state where maestro put it before calling your code.
+
+This means that you cannot do anything after a syscall, and that the
+stack is not a safe storing area for your data.
+
+So, you have to write your code as a state machine, with a big ugly
+switch. The previous code must be written something like:
+
+run_fun(globals, res) {
+
+ switch (globals->state) {
+ case l1: /* default value st. we take that branch the first time */
+ globals->state = l2;
+ SIMIX_req_comm_isend(....); /* syscall=>hard interrupt on our code*/
+ case l2: /* we'll take that branch the second time we're scheduled */
+ globals->comm = res;
+ globals->state = l3;
+ SIMIX_req_comm_wait(globals->comm); /* syscall=>interrupt */
+ case l3:
+ globals->state = where_you_want_to_go_today;
+ SIMIX_req_comm_destroy(globals->comm);
+ }
+}
+
+As you can see, the result of the /previous/ syscall is passed as second
+argument to the run_fun().
+
+
+Isn't all this beautifully awful?? A few gotos in your code are just
+what you need to go 20 years back to the good old time of gwbasic...
\ No newline at end of file
--- /dev/null
+/* Specific user API allowing to replay traces without context switches */
+
+/* Copyright (c) 2010. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include "simgrid_config.h" /* getline */
+#include "replay.h"
+#include "simix/simix.h"
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(replay,"trace replaying");
+
+replay_init_func_t replay_func_init=NULL;
+replay_run_func_t replay_func_run=NULL;
+replay_fini_func_t replay_func_fini=NULL;
+
+static int replay_get_PID(void);
+static int replay_get_PID(void) {
+ /* FIXME: implement it */
+ return 0;
+}
+
+static int replay_wrapper(int argc, char*argv[]) {
+ THROW_UNIMPLEMENTED;
+}
+/** \brief initialize the replay mechanism */
+void SG_replay_init(int *argc, char **argv) {
+ factory_initializer_to_use = statem_factory_init;
+ xbt_getpid = replay_get_PID;
+ SIMIX_global_init(argc, argv);
+
+ /* Restore the default exception handlers: we have no real processes */
+ __xbt_running_ctx_fetch = &__xbt_ex_ctx_default;
+ __xbt_ex_terminate = &__xbt_ex_terminate_default;
+
+ SIMIX_function_register_default(replay_wrapper);
+}
+void SG_replay_set_functions(replay_init_func_t init, replay_run_func_t run,replay_fini_func_t fini) {
+ replay_func_init =init;
+ replay_func_run =run;
+ replay_func_fini =fini;
+}
+
+/** \brief Loads a platform and deployment from the given file. Trace must be loaded from deployment */
+void SG_replay(const char *environment_file, const char *deploy_file) {
+ SIMIX_create_environment(environment_file);
+ SIMIX_launch_application(deploy_file);
+
+ SIMIX_run();
+}
--- /dev/null
+/* Specific user API allowing to replay traces without context switches */
+
+/* Copyright (c) 2010. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#ifndef TRACE_REPLAY_H_
+#define TRACE_REPLAY_H_
+
+#include "xbt/dynar.h"
+#include "simix/simix.h"
+#include "simix/context.h"
+
+/* function used in each process */
+int replay_runner(int argc, char *argv[]);
+/* initialize my factory */
+void statem_factory_init(smx_context_factory_t * factory);
+
+void SG_replay_init(int *argc, char **argv);
+
+typedef void *(*replay_init_func_t)(int argc, char *argv[]);
+typedef void (*replay_run_func_t)(void* data,void *syscall_result);
+typedef void (*replay_fini_func_t)(void* data);
+
+replay_init_func_t replay_func_init;
+replay_run_func_t replay_func_run;
+replay_fini_func_t replay_func_fini;
+void SG_replay_set_functions(replay_init_func_t init, replay_run_func_t run,replay_fini_func_t fini);
+
+void SG_replay(const char *environment_file, const char *deploy_file);
+
+
+/* Trace parsing logic */
+typedef struct s_replay_trace_reader *replay_trace_reader_t;
+
+replay_trace_reader_t replay_trace_reader_new(const char*filename);
+const char * const *replay_trace_reader_get(replay_trace_reader_t reader);
+void replay_trace_reader_free(replay_trace_reader_t *reader);
+const char *replay_trace_reader_position(replay_trace_reader_t reader);
+
+
+#endif /* TRACE_REPLAY_H_ */
--- /dev/null
+/* Example of traces replay without context switches, running MPI actions */
+
+/* Copyright (c) 2010. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include "replay.h"
+#include "xbt/log.h"
+#include "xbt/str.h"
+#include "xbt/dynar.h"
+#include "simix/smurf_private.h"
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(mpi_replay,"MPI replayer");
+
+
+/* Helper function */
+static double parse_double(const char *string) {
+ double value;
+ char *endptr;
+
+ value = strtod(string, &endptr);
+ if (*endptr != '\0')
+ THROW1(unknown_error, 0, "%s is not a double", string);
+ return value;
+}
+static int get_rank (const char *process_name){
+ return atoi(&(process_name[1]));
+}
+
+const char *state_name[] = {
+ "pump",
+ "compute0", "compute1", "compute2",
+ "send0","send1","send2","send3",
+ "irecv0",
+ "recv0",
+ "wait0",
+ "init0", "init1"
+};
+typedef enum {
+ e_mpi_pump_evt_trace=0,
+ e_mpi_compute0,e_mpi_compute1,e_mpi_compute2,
+ e_mpi_send0,e_mpi_send1,e_mpi_send2,e_mpi_send3,
+ e_mpi_irecv0,
+ e_mpi_recv0,
+ e_mpi_wait0,
+ e_mpi_init0,e_mpi_init1
+} e_mpi_replay_state_t;
+
+typedef struct {
+ /* Myself */
+ char *procname;
+ smx_host_t myhost;
+ e_mpi_replay_state_t state;
+ /* Parsing logic */
+ replay_trace_reader_t reader;
+ const char * const*evt;
+ /* simix interface */
+ smx_action_t act;
+
+ xbt_dynar_t isends; /* of msg_comm_t, cleaned up automatically on send event */
+} s_mpi_replay_t, *mpi_replay_t;
+
+static void *mpi_replay_init(int argc, char *argv[]) {
+
+ mpi_replay_t res = xbt_new0(s_mpi_replay_t,1);
+ res->procname = xbt_strdup(argv[0]);
+ res->state = e_mpi_pump_evt_trace;
+
+ res->reader = replay_trace_reader_new(argv[1]);
+ return res;
+}
+
+static void mpi_replay_run(void*data,void *syscall_res) {
+ mpi_replay_t g = (mpi_replay_t)data; /* my globals */
+
+ new_event:
+ INFO2("mpi_replay_run, state=%s (%d)",state_name[g->state],g->state);
+
+ switch(g->state){
+
+ case e_mpi_pump_evt_trace: { /* nothing to do, parse next event and call function again */
+
+ g->evt = replay_trace_reader_get(g->reader);
+ if (strcmp(g->procname, g->evt[0])) {
+ WARN1("Ignore trace element not for me at %s",
+ replay_trace_reader_position(g->reader));
+ goto new_event;
+ }
+
+ if (!strcmp(g->evt[1],"send")) {
+ g->state = e_mpi_send0;
+ goto new_event;
+ } else if (!strcmp(g->evt[1],"recv")) {
+ g->state = e_mpi_recv0;
+ goto new_event;
+ } else if (!strcmp(g->evt[1],"irecv")||!strcmp(g->evt[1],"Irecv")) {
+ g->state = e_mpi_irecv0;
+ goto new_event;
+ } else if (!strcmp(g->evt[1],"wait")) {
+ g->state = e_mpi_wait0;
+ goto new_event;
+ } else if (!strcmp(g->evt[1],"compute")) {
+ g->state = e_mpi_compute0;
+ goto new_event;
+ } else if (!strcmp(g->evt[1],"init")) {
+ g->state = e_mpi_init0;
+ goto new_event;
+ } else {
+ WARN2("Ignoring unrecognized trace element at %s: %s",
+ replay_trace_reader_position(g->reader),g->evt[1]);
+ goto new_event;
+ }
+ } THROW_IMPOSSIBLE;
+
+ /* *** Send *** */
+ case e_mpi_send0: {
+ char to[250];
+ sprintf(to, "%s_%s", g->procname, g->evt[2]);
+
+ DEBUG2("Entering Send at %s (size: %lg)",
+ replay_trace_reader_position(g->reader), parse_double(g->evt[3]));
+ g->state = e_mpi_send1;
+ SIMIX_req_rdv_create(to);
+ } THROW_IMPOSSIBLE;
+
+ case e_mpi_send1:
+ g->state = e_mpi_send2;
+ SIMIX_req_comm_isend(syscall_res, parse_double(g->evt[3]),-1,
+ NULL,0,//void *src_buff, size_t src_buff_size,
+ NULL,NULL);//int (*match_fun)(void *, void *), void *data)
+ THROW_IMPOSSIBLE;
+ case e_mpi_send2:
+ if (parse_double(g->evt[3])<65536) {
+ xbt_dynar_push(g->isends,&syscall_res);
+ g->state = e_mpi_pump_evt_trace;
+ goto new_event;
+ }
+ g->act = syscall_res;
+ g->state=e_mpi_send3;
+ SIMIX_req_comm_wait(g->act,-1);
+ case e_mpi_send3:
+ g->state=e_mpi_pump_evt_trace;
+ SIMIX_req_comm_destroy(g->act);
+
+ /* *** Computation *** */
+ case e_mpi_compute0:
+ g->state = e_mpi_compute1;
+ SIMIX_req_host_execute(replay_trace_reader_position(g->reader),
+ g->myhost,parse_double(g->evt[2]));
+ THROW_IMPOSSIBLE;
+ case e_mpi_compute1:
+ g->act = syscall_res;
+ g->state = e_mpi_compute2;
+ SIMIX_req_host_execution_wait(g->act);
+ THROW_IMPOSSIBLE;
+ case e_mpi_compute2:
+ g->state = e_mpi_pump_evt_trace;
+ SIMIX_req_host_execution_destroy(g->act);
+ THROW_IMPOSSIBLE;
+
+ case e_mpi_irecv0: xbt_die("irecv0 unimplemented");
+ case e_mpi_recv0: xbt_die("recv0 unimplemented");
+ case e_mpi_wait0: xbt_die("wait0 unimplemented");
+ case e_mpi_init0:
+ g->state = e_mpi_init1;
+ SIMIX_req_process_get_host(SIMIX_process_self());
+ THROW_IMPOSSIBLE;
+ case e_mpi_init1:
+ g->myhost = syscall_res;
+ g->state = e_mpi_pump_evt_trace;
+ goto new_event;
+
+ }
+ THROW_IMPOSSIBLE;
+}
+static void mpi_replay_fini(void *data) {
+ mpi_replay_t g = (mpi_replay_t)data;
+ replay_trace_reader_free(&g->reader);
+ free(data);
+}
+
+int main(int argc, char *argv[]) {
+ SG_replay_init(&argc,argv);
+ if (argc<3) {
+ fprintf(stderr,"USAGE: replay platform_file deployment_file\n");
+ exit(1);
+ }
+ SG_replay_set_functions(mpi_replay_init,mpi_replay_run,mpi_replay_fini);
+ SG_replay(argv[1],argv[2]);
+
+ return 0;
+}
--- /dev/null
+/* Copyright (c) 2010. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include "replay.h"
+#include "xbt/str.h"
+
+XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(replay);
+
+typedef struct s_replay_trace_reader {
+ FILE *fp;
+ char *line;
+ size_t line_len;
+ char *position; /* stable storage */
+ char *filename; int linenum;
+} s_replay_trace_reader_t;
+
+replay_trace_reader_t replay_trace_reader_new(const char*filename) {
+ replay_trace_reader_t res = xbt_new0(s_replay_trace_reader_t,1);
+ res->fp = fopen(filename, "r");
+ xbt_assert2(res->fp != NULL, "Cannot open %s: %s", filename,
+ strerror(errno));
+ res->filename = xbt_strdup(filename);
+ return res;
+}
+
+const char *replay_trace_reader_position(replay_trace_reader_t reader) {
+ if (reader->position)
+ free(reader->position);
+ reader->position = bprintf("%s:%d",reader->filename,reader->linenum);
+ return (const char*)reader->position;
+}
+const char * const *replay_trace_reader_get(replay_trace_reader_t reader) {
+ ssize_t read;
+ read = getline(&reader->line, &reader->line_len, reader->fp);
+ //INFO1("got from trace: %s",reader->line);
+ reader->linenum++;
+ if (read==-1)
+ return NULL; /* end of file */
+ char *comment = strchr(reader->line, '#');
+ if (comment != NULL)
+ *comment = '\0';
+ xbt_str_trim(reader->line, NULL);
+ if (reader->line[0] == '\0')
+ return replay_trace_reader_get(reader); /* Get next line */
+
+ return xbt_dynar_to_array(xbt_str_split_quoted_in_place(reader->line));
+}
+
+void replay_trace_reader_free(replay_trace_reader_t *reader) {
+ free((*reader)->filename);
+ if ((*reader)->position)
+ free((*reader)->position);
+ fclose((*reader)->fp);
+ free((*reader)->line);
+ free(*reader);
+ *reader=NULL;
+}
--- /dev/null
+/* Copyright (c) 2010. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include <setjmp.h>
+#include "replay.h"
+
+XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(replay);
+typedef struct s_statem_context {
+ s_smx_ctx_base_t base;
+ void *user_data;
+ jmp_buf jump;
+ int syscall_id; /* Identifier of previous syscall to SIMIX */
+} s_statem_context_t,*statem_context_t;
+
+static smx_context_t
+statem_create_context(xbt_main_func_t code, int argc, char **argv,
+ void_pfn_smxprocess_t cleanup_func, void *data);
+
+static void statem_ctx_free(smx_context_t context);
+static void statem_ctx_suspend(smx_context_t context);
+static void statem_ctx_resume(smx_context_t new_context);
+static void statem_ctx_runall(xbt_swag_t processes);
+static smx_context_t statem_ctx_self(void);
+
+void statem_factory_init(smx_context_factory_t * factory) {
+ /* instantiate the context factory */
+ smx_ctx_base_factory_init(factory);
+
+ (*factory)->create_context = statem_create_context;
+ (*factory)->free = statem_ctx_free;
+ (*factory)->suspend = statem_ctx_suspend;
+ (*factory)->runall = statem_ctx_runall;
+ (*factory)->name = "State Machine context factory";
+}
+
+static smx_context_t
+statem_create_context(xbt_main_func_t code, int argc, char **argv,
+ void_pfn_smxprocess_t cleanup_func, void *data){
+ if(argc>0 && !replay_func_init) {
+ fprintf(stderr,"variable replay_initer_function not set in replay_create_context. Severe issue!");
+ }
+
+ statem_context_t res = (statem_context_t)
+ smx_ctx_base_factory_create_context_sized(sizeof(s_statem_context_t),
+ code, argc, argv,
+ cleanup_func,
+ data);
+
+ if (argc>0) /* not maestro */
+ res->user_data = replay_func_init(argc,argv);
+ return (smx_context_t)res;
+}
+
+static void statem_ctx_free(smx_context_t context) {
+ if (replay_func_fini)
+ replay_func_fini(((statem_context_t)context)->user_data);
+ else if (((statem_context_t)context)->user_data)
+ free(((statem_context_t)context)->user_data);
+
+ smx_ctx_base_free(context);
+}
+/*static void replay_ctx_stop(smx_context_t context) {
+ THROW_UNIMPLEMENTED;
+}*/
+static void statem_ctx_suspend(smx_context_t context) {
+ statem_context_t ctx = (statem_context_t)context;
+ ctx->syscall_id = SIMIX_request_last_id();
+ longjmp(ctx->jump,1);
+}
+static void statem_ctx_resume(smx_context_t new_context) {
+ THROW_UNIMPLEMENTED;
+}
+static void statem_ctx_runall(xbt_swag_t processes) {
+ smx_context_t old_context;
+ smx_process_t process;
+
+ INFO0("Run all");
+ while ((process = xbt_swag_extract(processes))) {
+ statem_context_t ctx = (statem_context_t)SIMIX_process_get_context(process);
+ old_context = smx_current_context;
+ smx_current_context = SIMIX_process_get_context(process);
+ if (!setjmp(ctx->jump))
+ replay_func_run(((statem_context_t)smx_current_context)->user_data,
+ ctx->syscall_id==0?NULL:SIMIX_request_get_result(ctx->syscall_id));
+ smx_current_context = old_context;
+ }
+}
+
if (_surf_parallel_contexts)
xbt_os_mutex_acquire(sync_req_positions);
xbt_heap_push(req_todo,&issuer->request,issuer->pid);
+ DEBUG3("Pushed request %d of %s; now %d requests waiting",
+ issuer->request.call,issuer->name,xbt_heap_size(req_todo));
if (_surf_parallel_contexts)
xbt_os_mutex_release(sync_req_positions);
SIMIX_request_push();
return req->sem_get_capacity.result;
}
+/* ************************************************************************** */
+/** @brief gets the result of previous syscall
+ *
+ * This function is only useful in state machine mechanism.
+ *
+ * In this case, the execution of every SIMIX_req_* function above was cut at
+ * SIMIX_request_push(), which calls yield() which calls suspend(), which longjmp
+ * to the point right before running the user code. When the control is passed
+ * back to the user, he needs to get the result of the syscall he did.
+ * That is why this function is made for.
+ *
+ * To extend this function, simply make sure that the end of the SIMIX_req_*
+ * function matches what is written in this big switch
+ */
+void *SIMIX_request_get_result(int kind) {
+ smx_req_t req = SIMIX_req_mine();
+ switch ((e_smx_req_t) kind) {
+ case REQ_NO_REQ:
+ xbt_die("There is no request waiting, cannot provide the result");
+ case REQ_HOST_GET_BY_NAME:
+ return req->host_get_by_name.result;
+ case REQ_HOST_GET_NAME:
+ return (void*)req->host_get_name.result;
+ case REQ_HOST_GET_PROPERTIES:
+ return req->host_get_properties.result;
+ case REQ_HOST_GET_SPEED:
+ return &req->host_get_speed.result; /* double */
+ case REQ_HOST_GET_AVAILABLE_SPEED:
+ return &req->host_get_available_speed.result; /* double */
+ case REQ_HOST_GET_STATE:
+ return &req->host_get_state.result; /* int */
+ case REQ_HOST_GET_DATA:
+ return req->host_get_data.result;
+ case REQ_HOST_SET_DATA:
+ return NULL; /* void */
+ case REQ_HOST_EXECUTE:
+ return req->host_execute.result;
+ case REQ_HOST_PARALLEL_EXECUTE:
+ return req->host_parallel_execute.result;
+ case REQ_HOST_EXECUTION_DESTROY:
+ return NULL; /* void */
+ case REQ_HOST_EXECUTION_CANCEL:
+ return NULL; /* void */
+ case REQ_HOST_EXECUTION_GET_REMAINS:
+ return &req->host_execution_get_remains.result; /* double */
+ case REQ_HOST_EXECUTION_GET_STATE:
+ return &req->host_execution_get_state.result; /* e_smx_state_t */
+ case REQ_HOST_EXECUTION_SET_PRIORITY:
+ return NULL; /* void */
+ case REQ_HOST_EXECUTION_WAIT:
+ return NULL; /* void */
+ case REQ_PROCESS_CREATE:
+ return req->process_create.result;
+ case REQ_PROCESS_KILL:
+ return NULL; /* void */
+ case REQ_PROCESS_CHANGE_HOST:
+ return NULL; /* void */
+ case REQ_PROCESS_SUSPEND:
+ return NULL; /* void */
+ case REQ_PROCESS_RESUME:
+ return NULL; /* void */
+ case REQ_PROCESS_COUNT:
+ return &req->process_count.result; /* int */
+ case REQ_PROCESS_GET_DATA:
+ return req->process_get_data.result;
+ case REQ_PROCESS_SET_DATA:
+ return NULL; /* void */
+ case REQ_PROCESS_GET_HOST:
+ return req->process_get_host.result;
+ case REQ_PROCESS_GET_NAME:
+ return (void*)req->process_get_name.result;
+ case REQ_PROCESS_IS_SUSPENDED:
+ return &req->process_is_suspended.result; /* int */
+ case REQ_PROCESS_GET_PROPERTIES:
+ return req->process_get_properties.result;
+ case REQ_PROCESS_SLEEP:
+ return &req->process_sleep.result; /* e_smx_state_t */
+ case REQ_RDV_CREATE:
+ return req->rdv_create.result;
+ case REQ_RDV_DESTROY:
+ return NULL; /* void */
+ case REQ_RDV_GEY_BY_NAME:
+ return req->rdv_get_by_name.result;
+ case REQ_RDV_COMM_COUNT_BY_HOST:
+ return &req->rdv_comm_count_by_host.result; /* int */
+ case REQ_RDV_GET_HEAD:
+ return req->rdv_get_head.result;
+ case REQ_COMM_ISEND:
+ return req->comm_isend.result;
+ case REQ_COMM_IRECV:
+ return req->comm_irecv.result;
+ case REQ_COMM_DESTROY:
+ case REQ_COMM_CANCEL:
+ return NULL; /* void */
+ case REQ_COMM_WAITANY:
+ return &req->comm_waitany.result;
+ case REQ_COMM_TESTANY:
+ return &req->comm_testany.result;
+ case REQ_COMM_WAIT:
+ return NULL; /* void */
+#ifdef HAVE_TRACING
+ case REQ_SET_CATEGORY:
+ return NULL; /* void */
+#endif
+ case REQ_COMM_TEST:
+ return &req->comm_test.result; /* int */
+ case REQ_COMM_GET_REMAINS:
+ return &req->comm_get_remains.result; /* double */
+ case REQ_COMM_GET_STATE:
+ return &req->comm_get_state.result; /* e_smx_state_t */
+ case REQ_COMM_GET_SRC_DATA:
+ return req->comm_get_src_data.result;
+ case REQ_COMM_GET_DST_DATA:
+ return req->comm_get_dst_data.result;
+ case REQ_COMM_GET_SRC_BUFF:
+ return req->comm_get_src_buff.result;
+ case REQ_COMM_GET_DST_BUFF:
+ return req->comm_get_dst_buff.result;
+ case REQ_COMM_GET_SRC_BUFF_SIZE:
+ return &req->comm_get_src_buff_size.result; /* size_t */
+ case REQ_COMM_GET_DST_BUFF_SIZE:
+ return &req->comm_get_dst_buff_size.result; /* size_t */
+ case REQ_COMM_GET_SRC_PROC:
+ return req->comm_get_src_proc.result;
+ case REQ_COMM_GET_DST_PROC:
+ return req->comm_get_dst_proc.result;
+
+ #ifdef HAVE_LATENCY_BOUND_TRACKING
+ case REQ_COMM_IS_LATENCY_BOUNDED:
+ return &req->comm_is_latency_bounded.result; /* int */
+ #endif
+
+ case REQ_MUTEX_INIT:
+ return req->mutex_init.result;
+ case REQ_MUTEX_DESTROY:
+ case REQ_MUTEX_LOCK:
+ case REQ_MUTEX_UNLOCK:
+ return NULL; /* void */
+
+ case REQ_MUTEX_TRYLOCK:
+ return &req->mutex_trylock.result; /* int */
+
+ case REQ_COND_INIT:
+ return req->cond_init.result;
+ case REQ_COND_DESTROY:
+ case REQ_COND_SIGNAL:
+ case REQ_COND_WAIT:
+ case REQ_COND_WAIT_TIMEOUT:
+ case REQ_COND_BROADCAST:
+ return NULL; /* void */
+
+ case REQ_SEM_INIT:
+ return req->sem_init.result;
+ case REQ_SEM_DESTROY:
+ case REQ_SEM_RELEASE:
+ case REQ_SEM_ACQUIRE:
+ case REQ_SEM_ACQUIRE_TIMEOUT:
+ return NULL; /* void */
+
+ case REQ_SEM_WOULD_BLOCK:
+ return &req->sem_would_block.result; /* int */
+ case REQ_SEM_GET_CAPACITY:
+ return &req->sem_get_capacity.result; /* int */
+ }
+ THROW_IMPOSSIBLE;
+}
+/** @brief returns the id of the lastly done syscall
+ * Mainly (only?) useful for statemachine contextes
+ */
+int SIMIX_request_last_id() {
+ return SIMIX_req_mine()->call;
+}
