/* 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 <stdarg.h>
#include "smx_context_sysv_private.h"
-#include "xbt/threadpool.h"
+#include "xbt/parmap.h"
#include "simix/private.h"
#ifdef HAVE_VALGRIND_VALGRIND_H
XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
-static xbt_tpool_t tpool;
+static xbt_parmap_t parmap;
static smx_context_t
smx_ctx_sysv_create_context(xbt_main_func_t code, int argc, char **argv,
void_pfn_smxprocess_t cleanup_func, void* data);
-
-static void smx_ctx_sysv_wrapper(smx_ctx_sysv_t context);
+static void smx_ctx_sysv_wrapper(int count, ...);
void SIMIX_ctx_sysv_factory_init(smx_context_factory_t *factory)
{
smx_ctx_base_factory_init(factory);
+ VERB0("Activating SYSV context factory");
(*factory)->finalize = smx_ctx_sysv_factory_finalize;
(*factory)->create_context = smx_ctx_sysv_create_context;
(*factory)->suspend = smx_ctx_sysv_suspend;
(*factory)->name = "smx_sysv_context_factory";
- if(_surf_parallel_contexts){
- tpool = xbt_tpool_new(2, 10);
+ if (smx_parallel_contexts) {
+#ifdef CONTEXT_THREADS /* To use parallel ucontexts a thread pool is needed */
+ parmap = xbt_parmap_new(2);
(*factory)->runall = smx_ctx_sysv_runall_parallel;
+ (*factory)->self = smx_ctx_sysv_self_parallel;
+#else
+ THROW0(arg_error, 0, "No thread support for parallel context execution");
+#endif
}else{
(*factory)->runall = smx_ctx_sysv_runall;
}
int smx_ctx_sysv_factory_finalize(smx_context_factory_t *factory)
{
- if(tpool)
- xbt_tpool_destroy(tpool);
+ if(parmap)
+ xbt_parmap_destroy(parmap);
return smx_ctx_base_factory_finalize(factory);
}
void_pfn_smxprocess_t cleanup_func,
void *data)
{
-
+ uintptr_t ctx_addr;
smx_ctx_sysv_t context =
(smx_ctx_sysv_t) smx_ctx_base_factory_create_context_sized(size,
code,
((char *) context->uc.uc_stack.ss_sp) +
context->uc.uc_stack.ss_size);
#endif /* HAVE_VALGRIND_VALGRIND_H */
-
- makecontext(&((smx_ctx_sysv_t) context)->uc, (void (*)())smx_ctx_sysv_wrapper,
- sizeof(void*)/sizeof(int), context);
+ ctx_addr = (uintptr_t)context;
+ /* This switch select a case base on a static value: the compiler optimizes it out */
+ /* It could be replaced by a set of #ifdef/#else/#endif blocks */
+ switch(sizeof(uintptr_t) / sizeof(int)) {
+ case 1:
+ makecontext(&((smx_ctx_sysv_t) context)->uc, (void (*)())smx_ctx_sysv_wrapper,
+ 2, 1, (int)ctx_addr);
+ break;
+ case 2:
+ makecontext(&((smx_ctx_sysv_t) context)->uc, (void (*)())smx_ctx_sysv_wrapper,
+ 3, 2, (int)(ctx_addr >> (8 * sizeof(int))), (int)(ctx_addr));
+ break;
+ default:
+ THROW_IMPOSSIBLE;
+ }
+ }else{
+ maestro_context = context;
}
return (smx_context_t) context;
void smx_ctx_sysv_stop(smx_context_t context)
{
smx_ctx_base_stop(context);
-
smx_ctx_sysv_suspend(context);
}
-void smx_ctx_sysv_wrapper(smx_ctx_sysv_t context)
+void smx_ctx_sysv_wrapper(int count, ...)
{
+ uintptr_t ctx_addr = 0;
+ va_list ap;
+ smx_ctx_sysv_t context;
+ int i;
+
+ va_start(ap, count);
+ for(i = 0; i < count; i++) {
+ ctx_addr <<= 8*sizeof(int);
+ ctx_addr |= (uintptr_t)va_arg(ap, int);
+ }
+ va_end(ap);
+ context = (smx_ctx_sysv_t)ctx_addr;
(context->super.code) (context->super.argc, context->super.argv);
smx_ctx_sysv_stop((smx_context_t) context);
void smx_ctx_sysv_suspend(smx_context_t context)
{
- ucontext_t maestro_ctx =
- ((smx_ctx_sysv_t) simix_global->maestro_process->context)->uc;
-
- int rv = swapcontext(&((smx_ctx_sysv_t) context)->uc, &maestro_ctx);
+ smx_current_context = (smx_context_t)maestro_context;
+ int rv = swapcontext(&((smx_ctx_sysv_t) context)->uc, &((smx_ctx_sysv_t)context)->old_uc);
xbt_assert0((rv == 0), "Context swapping failure");
}
-void smx_ctx_sysv_resume(smx_context_t new_context)
+void smx_ctx_sysv_resume(smx_context_t context)
{
- smx_ctx_sysv_t maestro =
- (smx_ctx_sysv_t) simix_global->maestro_process->context;
-
- int rv =
- swapcontext(&(maestro->uc), &((smx_ctx_sysv_t) new_context)->uc);
+ smx_current_context = context;
+ int rv = swapcontext(&((smx_ctx_sysv_t)context)->old_uc, &((smx_ctx_sysv_t) context)->uc);
xbt_assert0((rv == 0), "Context swapping failure");
}
-void smx_ctx_sysv_runall(xbt_swag_t processes)
+void smx_ctx_sysv_runall(xbt_dynar_t processes)
{
- smx_context_t old_context;
smx_process_t process;
-
- while ((process = xbt_swag_extract(processes))) {
- old_context = smx_current_context;
- smx_current_context = process->context;
- smx_ctx_sysv_resume(smx_current_context);
- smx_current_context = old_context;
+ unsigned int cursor;
+
+ xbt_dynar_foreach(processes, cursor, process) {
+ DEBUG2("Schedule item %u of %lu",cursor,xbt_dynar_length(processes));
+ smx_ctx_sysv_resume(process->context);
}
+ xbt_dynar_reset(processes);
}
-void smx_ctx_sysv_runall_parallel(xbt_swag_t processes)
+void smx_ctx_sysv_resume_parallel(smx_process_t process)
{
- smx_process_t process;
- while((process = xbt_swag_extract(processes))){
- xbt_tpool_queue_job(tpool, (void_f_pvoid_t)smx_ctx_sysv_resume, process->context);
- }
+ smx_context_t context = process->context;
+ xbt_os_thread_set_extra_data(context);
+ int rv = swapcontext(&((smx_ctx_sysv_t)context)->old_uc, &((smx_ctx_sysv_t) context)->uc);
+ xbt_os_thread_set_extra_data(NULL);
+
+ xbt_assert0((rv == 0), "Context swapping failure");
+}
+
+void smx_ctx_sysv_runall_parallel(xbt_dynar_t processes)
+{
+ xbt_parmap_apply(parmap, (void_f_pvoid_t)smx_ctx_sysv_resume_parallel, processes);
+ xbt_dynar_reset(processes);
+}
+
+smx_context_t smx_ctx_sysv_self_parallel(void)
+{
+ smx_context_t self_context = (smx_context_t) xbt_os_thread_get_extra_data();
+ return self_context ? self_context : (smx_context_t) maestro_context;
}
