+/* $Id$ */
+
+/* context_sysv - implementation of context switching with ucontextes from Sys V */
+
+/* Copyright (c) 2004-2008 the SimGrid team. All right 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 "xbt/ex_interface.h"
#include "xbt/xbt_context_private.h"
#define STACK_SIZE 128*1024 /* lower this if you want to reduce the memory consumption */
#ifdef HAVE_VALGRIND_VALGRIND_H
# include <valgrind/valgrind.h>
-#endif /* HAVE_VALGRIND_VALGRIND_H */
+#endif /* HAVE_VALGRIND_VALGRIND_H */
+
+XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(xbt_context);
typedef struct s_xbt_ctx_sysv {
XBT_CTX_BASE_T;
- ucontext_t uc; /* the thread that execute the code */
- char stack[STACK_SIZE]; /* the thread stack size */
- struct s_xbt_ctx_sysv *prev; /* the previous thread */
+ ucontext_t uc; /* the thread that execute the code */
+ char stack[STACK_SIZE]; /* the thread stack size */
+ struct s_xbt_ctx_sysv *prev; /* the previous thread */
#ifdef HAVE_VALGRIND_VALGRIND_H
- unsigned int valgrind_stack_id; /* the valgrind stack id. */
-#endif /* HAVE_VALGRIND_VALGRIND_H */
+ unsigned int valgrind_stack_id; /* the valgrind stack id. */
+#endif /* HAVE_VALGRIND_VALGRIND_H */
} s_xbt_ctx_sysv_t, *xbt_ctx_sysv_t;
xbt_ctx_sysv_t context = xbt_new0(s_xbt_ctx_sysv_t, 1);
+ context->name = (char *) "maestro";
+
context->exception = xbt_new(ex_ctx_t, 1);
XBT_CTX_INITIALIZE(context->exception);
void_f_pvoid_t cleanup_func,
void *cleanup_arg, int argc, char **argv)
{
+ VERB1("Create context %s", name);
xbt_ctx_sysv_t context = xbt_new0(s_xbt_ctx_sysv_t, 1);
context->code = code;
pth_skaddr_makecontext(context->stack, STACK_SIZE);
context->uc.uc_stack.ss_size =
pth_sksize_makecontext(context->stack, 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 */
+#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 */
context->exception = xbt_new(ex_ctx_t, 1);
XBT_CTX_INITIALIZE(context->exception);
if (context->exception)
free(context->exception);
- #ifdef HAVE_VALGRIND_VALGRIND_H
- VALGRIND_STACK_DEREGISTER(((xbt_ctx_sysv_t)context)->valgrind_stack_id);
- #endif /* HAVE_VALGRIND_VALGRIND_H */
+#ifdef HAVE_VALGRIND_VALGRIND_H
+ VALGRIND_STACK_DEREGISTER(((xbt_ctx_sysv_t) context)->valgrind_stack_id);
+#endif /* HAVE_VALGRIND_VALGRIND_H */
/* finally destroy the context */
free(context);
static void xbt_ctx_sysv_kill(xbt_context_t context)
{
+ DEBUG2("Kill context '%s' (from '%s')", context->name,
+ current_context->name);
context->iwannadie = 1;
xbt_ctx_sysv_swap(context);
}
*/
static void xbt_ctx_sysv_schedule(xbt_context_t context)
{
+ DEBUG1("Schedule context '%s'", context->name);
xbt_assert0((current_context == maestro_context),
"You are not supposed to run this function here!");
xbt_ctx_sysv_swap(context);
*/
static void xbt_ctx_sysv_yield(void)
{
+ DEBUG1("Yielding context '%s'", current_context->name);
xbt_assert0((current_context != maestro_context),
"You are not supposed to run this function here!");
xbt_ctx_sysv_swap(current_context);
static void xbt_ctx_sysv_start(xbt_context_t context)
{
+ DEBUG1("Start context '%s'", context->name);
makecontext(&(((xbt_ctx_sysv_t) context)->uc), xbt_ctx_sysv_wrapper, 0);
}
static void xbt_ctx_sysv_stop(int exit_code)
{
+ /* please no debug here: our procdata was already free'd */
if (current_context->cleanup_func)
((*current_context->cleanup_func)) (current_context->cleanup_arg);
static void xbt_ctx_sysv_swap(xbt_context_t context)
{
+ DEBUG2("Swap context: '%s' -> '%s'", current_context->name, context->name);
xbt_assert0(current_context, "You have to call context_init() first.");
xbt_assert0(context, "Invalid argument");
{
int rv;
+ DEBUG1("Suspend context: '%s'", current_context->name);
xbt_ctx_sysv_t prev_context = ((xbt_ctx_sysv_t) context)->prev;
current_context = (xbt_context_t) (((xbt_ctx_sysv_t) context)->prev);
{
int rv;
+ DEBUG2("Resume context: '%s' (from '%s')", context->name,
+ current_context->name);
((xbt_ctx_sysv_t) context)->prev = (xbt_ctx_sysv_t) current_context;
current_context = context;