/* 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/parmap.h"
+#include "simix/private.h"
+#include "gras_config.h"
#ifdef HAVE_VALGRIND_VALGRIND_H
# include <valgrind/valgrind.h>
-#endif /* HAVE_VALGRIND_VALGRIND_H */
+#endif /* HAVE_VALGRIND_VALGRIND_H */
#ifdef _XBT_WIN32
- #include "win32_ucontext.h"
- #include "win32_ucontext.c"
+#include "win32_ucontext.h"
+#include "win32_ucontext.c"
#else
- #include "ucontext.h"
- #include "ucontext.c"
+#include "ucontext.h"
#endif
XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
-static smx_context_t
-smx_ctx_sysv_create_context(xbt_main_func_t code, int argc, char** argv,
- void_f_pvoid_t cleanup_func, void* cleanup_arg);
-
-
-static void smx_ctx_sysv_wrapper(void);
+#ifdef CONTEXT_THREADS
+static xbt_parmap_t parmap;
+#endif
-void SIMIX_ctx_sysv_factory_init(smx_context_factory_t *factory) {
+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(int count, ...);
+
+/* This is a bit paranoid about SIZEOF_VOIDP not being a multiple of SIZEOF_INT,
+ * but it doesn't harm. */
+#define CTX_ADDR_LEN (SIZEOF_VOIDP / SIZEOF_INT + !!(SIZEOF_VOIDP % SIZEOF_INT))
+union u_ctx_addr {
+ void *addr;
+ int intv[CTX_ADDR_LEN];
+};
+#if (CTX_ADDR_LEN == 1)
+# define CTX_ADDR_SPLIT(u) (u).intv[0]
+#elif (CTX_ADDR_LEN == 2)
+# define CTX_ADDR_SPLIT(u) (u).intv[0], (u).intv[1]
+#else
+# error Your architecture is not supported yet
+#endif
+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;
/* Do not overload that method (*factory)->finalize */
(*factory)->free = smx_ctx_sysv_free;
(*factory)->stop = smx_ctx_sysv_stop;
(*factory)->suspend = smx_ctx_sysv_suspend;
- (*factory)->resume = smx_ctx_sysv_resume;
(*factory)->name = "smx_sysv_context_factory";
+
+ if (SIMIX_context_is_parallel()) {
+#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;
+ (*factory)->get_thread_id = smx_ctx_sysv_get_thread_id;
+#else
+ THROW0(arg_error, 0, "No thread support for parallel context execution");
+#endif
+ }else{
+ (*factory)->runall = smx_ctx_sysv_runall;
+ }
}
-smx_context_t
-smx_ctx_sysv_create_context_sized(size_t size, xbt_main_func_t code, int argc, char** argv,
- void_f_pvoid_t cleanup_func, void* cleanup_arg) {
+int smx_ctx_sysv_factory_finalize(smx_context_factory_t *factory)
+{
+ if(parmap)
+ xbt_parmap_destroy(parmap);
+ return smx_ctx_base_factory_finalize(factory);
+}
- smx_ctx_sysv_t context = (smx_ctx_sysv_t)smx_ctx_base_factory_create_context_sized
- (size, code,argc,argv,cleanup_func,cleanup_arg);
+smx_context_t
+smx_ctx_sysv_create_context_sized(size_t size, xbt_main_func_t code,
+ int argc, char **argv,
+ void_pfn_smxprocess_t cleanup_func,
+ void *data)
+{
+ union u_ctx_addr ctx_addr;
+ smx_ctx_sysv_t context =
+ (smx_ctx_sysv_t) smx_ctx_base_factory_create_context_sized(size,
+ code,
+ argc,
+ argv,
+ cleanup_func,
+ data);
/* If the user provided a function for the process then use it
otherwise is the context for maestro */
- if(code){
+ if (code) {
xbt_assert2(getcontext(&(context->uc)) == 0,
- "Error in context saving: %d (%s)", errno, strerror(errno));
+ "Error in context saving: %d (%s)", errno,
+ strerror(errno));
context->uc.uc_link = NULL;
context->uc.uc_stack.ss_sp =
- pth_skaddr_makecontext(context->stack, CONTEXT_STACK_SIZE);
+ pth_skaddr_makecontext(context->stack, smx_context_stack_size);
context->uc.uc_stack.ss_size =
- pth_sksize_makecontext(context->stack, CONTEXT_STACK_SIZE);
+ pth_sksize_makecontext(context->stack, smx_context_stack_size);
#ifdef HAVE_VALGRIND_VALGRIND_H
context->valgrind_stack_id =
VALGRIND_STACK_REGISTER(context->uc.uc_stack.ss_sp,
- ((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, smx_ctx_sysv_wrapper, 0);
+ ((char *) context->uc.uc_stack.ss_sp) +
+ context->uc.uc_stack.ss_size);
+#endif /* HAVE_VALGRIND_VALGRIND_H */
+ ctx_addr.addr = context;
+ makecontext(&context->uc, (void (*)())smx_ctx_sysv_wrapper,
+ CTX_ADDR_LEN, CTX_ADDR_SPLIT(ctx_addr));
+ }else{
+ maestro_context = context;
}
- return (smx_context_t)context;
+ return (smx_context_t) context;
}
static smx_context_t
-smx_ctx_sysv_create_context(xbt_main_func_t code, int argc, char** argv,
- void_f_pvoid_t cleanup_func, void* cleanup_arg) {
+smx_ctx_sysv_create_context(xbt_main_func_t code, int argc, char **argv,
+ void_pfn_smxprocess_t cleanup_func,
+ void *data)
+{
- return smx_ctx_sysv_create_context_sized(sizeof(s_smx_ctx_sysv_t),
- code,argc,argv,cleanup_func,cleanup_arg);
+ return smx_ctx_sysv_create_context_sized(sizeof(s_smx_ctx_sysv_t) + smx_context_stack_size,
+ code, argc, argv, cleanup_func,
+ data);
}
-void smx_ctx_sysv_free(smx_context_t context) {
+void smx_ctx_sysv_free(smx_context_t context)
+{
- if (context){
+ if (context) {
#ifdef HAVE_VALGRIND_VALGRIND_H
- VALGRIND_STACK_DEREGISTER(((smx_ctx_sysv_t) context)->valgrind_stack_id);
-#endif /* HAVE_VALGRIND_VALGRIND_H */
+ VALGRIND_STACK_DEREGISTER(((smx_ctx_sysv_t)
+ context)->valgrind_stack_id);
+#endif /* HAVE_VALGRIND_VALGRIND_H */
}
smx_ctx_base_free(context);
}
-void smx_ctx_sysv_stop(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() {
- /*FIXME: I would like to avoid accessing simix_global to get the current
- context by passing it as an argument of the wrapper function. The problem
- is that this function is called from smx_ctx_sysv_start, and uses
- makecontext for calling it, and the stupid posix specification states that
- all the arguments of the function should be int(32 bits), making it useless
- in 64-bit architectures where pointers are 64 bit long.
- */
- smx_ctx_sysv_t context =
- (smx_ctx_sysv_t)simix_global->current_process->context;
-
+void smx_ctx_sysv_wrapper(int first, ...)
+{
+ union u_ctx_addr ctx_addr;
+ smx_ctx_sysv_t context;
+
+ ctx_addr.intv[0] = first;
+ if (CTX_ADDR_LEN > 1) {
+ va_list ap;
+ int i;
+ va_start(ap, first);
+ for(i = 1; i < CTX_ADDR_LEN; i++)
+ ctx_addr.intv[i] = va_arg(ap, int);
+ va_end(ap);
+ }
+ context = ctx_addr.addr;
(context->super.code) (context->super.argc, context->super.argv);
- smx_ctx_sysv_stop((smx_context_t)context);
+ 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;
+void smx_ctx_sysv_suspend(smx_context_t context)
+{
+ smx_current_context = (smx_context_t)maestro_context;
+ int rv;
+ rv = swapcontext(&((smx_ctx_sysv_t) context)->uc, &((smx_ctx_sysv_t)context)->old_uc);
- int rv = swapcontext(&((smx_ctx_sysv_t) context)->uc, &maestro_ctx);
+ xbt_assert0((rv == 0), "Context swapping failure");
+}
+
+void smx_ctx_sysv_resume(smx_context_t context)
+{
+ smx_current_context = context;
+ int rv;
+ 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_resume(smx_context_t new_context) {
- smx_ctx_sysv_t maestro = (smx_ctx_sysv_t)simix_global->maestro_process->context;
+void smx_ctx_sysv_runall(xbt_dynar_t processes)
+{
+ smx_process_t process;
+ 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);
+}
- int rv = swapcontext(&(maestro->uc), &((smx_ctx_sysv_t)new_context)->uc);
+void smx_ctx_sysv_resume_parallel(smx_process_t process)
+{
+ smx_context_t context = process->context;
+ smx_current_context = (smx_context_t)context;
+ int rv;
+ rv = swapcontext(&((smx_ctx_sysv_t)context)->old_uc, &((smx_ctx_sysv_t) context)->uc);
+ smx_current_context = (smx_context_t)maestro_context;
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;*/
+ return smx_current_context;
+}
+
+int smx_ctx_sysv_get_thread_id(void)
+{
+ return (int)(unsigned long)xbt_os_thread_get_extra_data();
+}
