#include "xbt/error.h"
#include "xbt/dynar.h"
#include "gras_config.h"
+
+ /** \defgroup XBT_context User-level context library
+ * \brief This section describes how to use high-level functions
+ * (as opposed to <tt>setjump/longjmp</tt>) to schedule non-preemptible
+ * threads.
+ */
+
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(context, xbt, "Context");
/* #define WARNING(format, ...) (fprintf(stderr, "[%s , %s : %d] ", __FILE__, __FUNCTION__, __LINE__),\ */
return;
}
+/** \name Functions
+ * \ingroup XBT_context
+ */
+/*@{*/
+/** Context module initialization
+ *
+ * \warning It has to be called before using any other function of this module.
+ */
void xbt_context_init(void)
{
if(!current_context) {
}
}
+/** Garbage collection
+ *
+ * Should be called some time to time to free the memory allocated for contexts
+ * that have finished executing their main functions.
+ */
void xbt_context_empty_trash(void)
{
xbt_context_t context=NULL;
return NULL;
}
+/**
+ * \param context the context to start
+ *
+ * Calling this function prepares \a context to be run. It will
+ however run effectively only when calling #xbt_context_schedule
+ */
void xbt_context_start(xbt_context_t context)
{
/* xbt_fifo_insert(msg_global->process, process); */
return;
}
+/**
+ * \param code a main function
+ * \param startup_func a function to call when running the context for
+ * the first time and just before the main function \a code
+ * \param startup_arg the argument passed to the previous function (\a startup_func)
+ * \param cleanup_func a function to call when running the context, just after
+ the termination of the main function \a code
+ * \param cleanup_arg the argument passed to the previous function (\a cleanup_func)
+ * \param argc first argument of function \a code
+ * \param argv seconde argument of function \a code
+ */
xbt_context_t xbt_context_new(xbt_context_function_t code,
void_f_pvoid_t startup_func, void *startup_arg,
void_f_pvoid_t cleanup_func, void *cleanup_arg,
res = xbt_new0(s_xbt_context_t,1);
- xbt_assert0(getcontext(&(res->uc))==0,"Error in context saving.");
+ /* FIXME: strerror is not thread safe */
+ xbt_assert2(getcontext(&(res->uc))==0,"Error in context saving: %d (%s)", errno, strerror(errno));
res->code = code;
res->uc.uc_link = NULL;
}
+/**
+ * Calling this function makes the current context yield. The context
+ * that scheduled it returns from xbt_context_schedule as if nothing
+ * had happened.
+ */
void xbt_context_yield(void)
{
__xbt_context_yield(current_context);
}
+
+/**
+ * \param context the winner
+ *
+ * Calling this function blocks the current context and schedule \a context.
+ * When \a context will call xbt_context_yield, it will return
+ * to this function as if nothing had happened.
+ */
void xbt_context_schedule(xbt_context_t context)
{
xbt_assert0((current_context==init_context),
__xbt_context_yield(context);
}
+/**
+ * This function kill all existing context and free all the memory
+ * that has been allocated in this module.
+ */
void xbt_context_exit(void) {
xbt_context_t context=NULL;
init_context = current_context = NULL ;
}
+/**
+ * \param context poor victim
+ *
+ * This function simply kills \a context... scarry isn't it ?
+ */
void xbt_context_free(xbt_context_t context)
{
int i ;
return;
}
+/*@}*/