#include "xbt/ex_interface.h"
#include "private.h"
-
-#include "context_sysv_config.h" /* loads context system definitions */
+#include "context_sysv_config.h" /* loads context system definitions */
#include "portable.h"
-#include <ucontext.h> /* context relative declarations */
-#define STACK_SIZE 128*1024 /* lower this if you want to reduce the memory consumption */
+#include <ucontext.h> /* context relative declarations */
+
+/* lower this if you want to reduce the memory consumption */
+#define STACK_SIZE 128*1024
+
#ifdef HAVE_VALGRIND_VALGRIND_H
# include <valgrind/valgrind.h>
#endif /* HAVE_VALGRIND_VALGRIND_H */
-XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(smx_context);
+XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(simix_context);
typedef struct s_smx_ctx_sysv {
SMX_CTX_BASE_T;
ucontext_t uc; /* the thread that execute the code */
char stack[STACK_SIZE]; /* the thread stack size */
- smx_process_t prev; /* the previous process */
+ struct s_smx_ctx_sysv *prev; /* the previous process */
#ifdef HAVE_VALGRIND_VALGRIND_H
unsigned int valgrind_stack_id; /* the valgrind stack id */
#endif
static ex_ctx_t *xbt_jcontext_ex_ctx(void);
/* callback: termination */
-static void xbt_jcontext_ex_terminate(xbt_ex_t * e);
-
-static int
-smx_ctx_sysv_factory_create_context(smx_process_t *smx_process, xbt_main_func_t code);
-
-static int smx_ctx_sysv_factory_finalize(smx_context_factory_t * factory);
-
-static int smx_ctx_sysv_factory_create_maestro_context(smx_process_t * maestro);
-
-static void smx_ctx_sysv_free(smx_process_t process);
-
-static void smx_ctx_sysv_kill(smx_process_t process);
-
-static void smx_ctx_sysv_schedule(smx_process_t process);
+static void xbt_jcontext_ex_terminate(xbt_ex_t *e);
-static void smx_ctx_sysv_yield(void);
+static smx_context_t
+smx_ctx_sysv_factory_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_start(smx_process_t process);
+static int smx_ctx_sysv_factory_finalize(smx_context_factory_t *factory);
-static void smx_ctx_sysv_stop(int exit_code);
+static smx_context_t smx_ctx_sysv_factory_create_maestro_context(void);
-static void smx_ctx_sysv_swap(smx_process_t process);
+static void smx_ctx_sysv_free(smx_context_t context);
-static void smx_ctx_sysv_schedule(smx_process_t process);
+static void smx_ctx_sysv_start(smx_context_t context);
-static void smx_ctx_sysv_yield(void);
+static void smx_ctx_sysv_stop(smx_context_t context);
-static void smx_ctx_sysv_suspend(smx_process_t process);
+static void smx_ctx_sysv_suspend(smx_context_t context);
-static void smx_ctx_sysv_resume(smx_process_t process);
+static void
+ smx_ctx_sysv_resume(smx_context_t old_context, smx_context_t new_context);
static void smx_ctx_sysv_wrapper(void);
/* callback: context fetching */
static ex_ctx_t *xbt_ctx_sysv_ex_ctx(void)
{
+ /*FIXME: the factory should access simix level datastructures! */
return simix_global->current_process->context->exception;
}
abort();
}
-void SIMIX_ctx_sysv_factory_init(smx_context_factory_t * factory)
+void SIMIX_ctx_sysv_factory_init(smx_context_factory_t *factory)
{
*factory = xbt_new0(s_smx_context_factory_t, 1);
(*factory)->finalize = smx_ctx_sysv_factory_finalize;
(*factory)->create_maestro_context = smx_ctx_sysv_factory_create_maestro_context;
(*factory)->free = smx_ctx_sysv_free;
- (*factory)->kill = smx_ctx_sysv_kill;
- (*factory)->schedule = smx_ctx_sysv_schedule;
- (*factory)->yield = smx_ctx_sysv_yield;
(*factory)->start = smx_ctx_sysv_start;
(*factory)->stop = smx_ctx_sysv_stop;
+ (*factory)->suspend = smx_ctx_sysv_suspend;
+ (*factory)->resume = smx_ctx_sysv_resume;
(*factory)->name = "smx_sysv_context_factory";
/* context exception handlers */
__xbt_ex_terminate = xbt_ctx_sysv_ex_terminate;
}
-static int smx_ctx_sysv_factory_create_maestro_context(smx_process_t *maestro)
+static smx_context_t smx_ctx_sysv_factory_create_maestro_context()
{
smx_ctx_sysv_t context = xbt_new0(s_smx_ctx_sysv_t, 1);
- context->exception = xbt_new(ex_ctx_t, 1);
+ context->exception = xbt_new(ex_ctx_t, 1);
XBT_CTX_INITIALIZE(context->exception);
- (*maestro)->context = (smx_context_t) context;
-
- return 0;
-
+ return (smx_context_t)context;
}
static int smx_ctx_sysv_factory_finalize(smx_context_factory_t * factory)
return 0;
}
-static int
-smx_ctx_sysv_factory_create_context(smx_process_t *smx_process, xbt_main_func_t code)
+static smx_context_t
+smx_ctx_sysv_factory_create_context(xbt_main_func_t code, int argc, char** argv,
+ void_f_pvoid_t cleanup_func, void* cleanup_arg)
{
- VERB1("Create context %s", (*smx_process)->name);
smx_ctx_sysv_t context = xbt_new0(s_smx_ctx_sysv_t, 1);
context->code = code;
context->exception = xbt_new(ex_ctx_t, 1);
XBT_CTX_INITIALIZE(context->exception);
- (*smx_process)->context = (smx_context_t)context;
- (*smx_process)->iwannadie = 0;
-
- /* FIXME: Check what should return */
- return 1;
+ context->argc = argc;
+ context->argv = argv;
+ context->cleanup_func = cleanup_func;
+ context->cleanup_arg = cleanup_arg;
+ return (smx_context_t)context;
}
-static void smx_ctx_sysv_free(smx_process_t process)
+static void smx_ctx_sysv_free(smx_context_t pcontext)
{
- smx_ctx_sysv_t context = (smx_ctx_sysv_t)process->context;
+ int i;
+ smx_ctx_sysv_t context = (smx_ctx_sysv_t)pcontext;
if (context){
if (context->exception)
VALGRIND_STACK_DEREGISTER(((smx_ctx_sysv_t) context)->valgrind_stack_id);
#endif /* HAVE_VALGRIND_VALGRIND_H */
+ /* free argv */
+ if (context->argv) {
+ for (i = 0; i < context->argc; i++)
+ if (context->argv[i])
+ free(context->argv[i]);
+
+ free(context->argv);
+ }
+
/* destroy the context */
free(context);
}
}
-static void smx_ctx_sysv_kill(smx_process_t process)
-{
- DEBUG2("Kill process '%s' (from '%s')", process->name,
- simix_global->current_process->name);
- process->iwannadie = 1;
- smx_ctx_sysv_swap(process);
+static void smx_ctx_sysv_start(smx_context_t context)
+{
+ makecontext(&((smx_ctx_sysv_t)context)->uc, smx_ctx_sysv_wrapper, 0);
}
-/**
- * \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.
- *
- * Only the maestro can call this function to run a given process.
- */
-static void smx_ctx_sysv_schedule(smx_process_t process)
+static void smx_ctx_sysv_stop(smx_context_t pcontext)
{
- DEBUG1("Schedule process '%s'", process->name);
- xbt_assert0((simix_global->current_process == simix_global->maestro_process),
- "You are not supposed to run this function here!");
- smx_ctx_sysv_swap(process);
-}
+ smx_ctx_sysv_t context = (smx_ctx_sysv_t)pcontext;
+
+ if (context->cleanup_func)
+ (*context->cleanup_func) (context->cleanup_arg);
-/**
- * Calling this function makes the current context yield. The context
- * that scheduled it returns from xbt_context_schedule as if nothing
- * had happened.
- *
- * Only the processes can call this function, giving back the control
- * to the maestro
- */
-static void smx_ctx_sysv_yield(void)
-{
- DEBUG1("Yielding process '%s'", simix_global->current_process->name);
- xbt_assert0((simix_global->current_process != simix_global->maestro_process),
- "You are not supposed to run this function here!");
- smx_ctx_sysv_swap(simix_global->current_process);
-}
-
-static void smx_ctx_sysv_start(smx_process_t process)
-{
- /*DEBUG1("Start context '%s'", context->name);*/
- makecontext(&(((smx_ctx_sysv_t) process->context)->uc), smx_ctx_sysv_wrapper, 0);
-}
-
-static void smx_ctx_sysv_stop(int exit_code)
-{
- /* please no debug here: our procdata was already free'd */
- if (simix_global->current_process->cleanup_func)
- ((*simix_global->current_process->cleanup_func)) (simix_global->current_process->cleanup_arg);
-
- smx_ctx_sysv_swap(simix_global->current_process);
+ smx_ctx_sysv_suspend((smx_context_t)context);
}
-static void smx_ctx_sysv_swap(smx_process_t process)
+static void smx_ctx_sysv_wrapper()
{
- DEBUG2("Swap context: '%s' -> '%s'", simix_global->current_process->name, process->name);
- xbt_assert0(simix_global->current_process, "You have to call context_init() first.");
- xbt_assert0(process, "Invalid argument");
-
- if (((smx_ctx_sysv_t) process->context)->prev == NULL)
- smx_ctx_sysv_resume(process);
- else
- smx_ctx_sysv_suspend(process);
-
- if (simix_global->current_process->iwannadie)
- smx_ctx_sysv_stop(1);
-}
-
-static void smx_ctx_sysv_wrapper(void)
-{
- smx_ctx_sysv_stop((*(simix_global->current_process->context->code))
- (simix_global->current_process->argc, simix_global->current_process->argv));
+ /*FIXME: I would like to avoid accesing 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;
+
+ (context->code) (context->argc, context->argv);
+
+ smx_ctx_sysv_stop((smx_context_t)context);
}
-static void smx_ctx_sysv_suspend(smx_process_t process)
+static void smx_ctx_sysv_suspend(smx_context_t context)
{
int rv;
- DEBUG1("Suspend context: '%s'", simix_global->current_process->name);
- smx_process_t prev_process = ((smx_ctx_sysv_t) process->context)->prev;
-
- simix_global->current_process = prev_process;
+ smx_ctx_sysv_t prev_context = ((smx_ctx_sysv_t) context)->prev;
- ((smx_ctx_sysv_t) process->context)->prev = NULL;
+ ((smx_ctx_sysv_t) context)->prev = NULL;
- rv = swapcontext(&(((smx_ctx_sysv_t) process->context)->uc), &(((smx_ctx_sysv_t)prev_process->context)->uc));
+ rv = swapcontext(&((smx_ctx_sysv_t) context)->uc, &prev_context->uc);
xbt_assert0((rv == 0), "Context swapping failure");
}
-static void smx_ctx_sysv_resume(smx_process_t process)
+static void
+smx_ctx_sysv_resume(smx_context_t old_context, smx_context_t new_context)
{
int rv;
- smx_ctx_sysv_t new_context = (smx_ctx_sysv_t)process->context;
- smx_ctx_sysv_t prev_context = (smx_ctx_sysv_t)simix_global->current_process->context;
-
- DEBUG2("Resume context: '%s' (from '%s')", process->name,
- simix_global->current_process->name);
-
- ((smx_ctx_sysv_t) process->context)->prev = simix_global->current_process;
- simix_global->current_process = process;
+ ((smx_ctx_sysv_t) new_context)->prev = (smx_ctx_sysv_t)old_context;
- rv = swapcontext(&prev_context->uc, &new_context->uc);
+ rv = swapcontext(&((smx_ctx_sysv_t)old_context)->uc,
+ &((smx_ctx_sysv_t)new_context)->uc);
xbt_assert0((rv == 0), "Context swapping failure");
}
