X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/d683520a4fa56accfe70e693d9336dd740f7bf35..a6a397ff4796b51612a295c39ce1f762ea9933e6:/src/simix/smx_context_sysv.c diff --git a/src/simix/smx_context_sysv.c b/src/simix/smx_context_sysv.c index 0638d97f35..afa54030fe 100644 --- a/src/simix/smx_context_sysv.c +++ b/src/simix/smx_context_sysv.c @@ -7,276 +7,136 @@ /* 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 "private.h" - -#include "context_sysv_config.h" /* loads context system definitions */ +#include "context_sysv_config.h" /* loads context system definitions */ #include "portable.h" -#include /* context relative declarations */ -#define STACK_SIZE 128*1024 /* lower this if you want to reduce the memory consumption */ +#include /* context relative declarations */ + +/* lower this if you want to reduce the memory consumption */ +#define STACK_SIZE 128*1024 + #ifdef HAVE_VALGRIND_VALGRIND_H # include #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; + s_smx_ctx_base_t super; /* Fields of super implementation */ ucontext_t uc; /* the thread that execute the code */ char stack[STACK_SIZE]; /* the thread stack size */ - smx_process_t prev; /* the previous process */ #ifdef HAVE_VALGRIND_VALGRIND_H unsigned int valgrind_stack_id; /* the valgrind stack id */ #endif } s_smx_ctx_sysv_t, *smx_ctx_sysv_t; +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); -/* callback: context fetching */ -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 smx_ctx_sysv_yield(void); - -static void smx_ctx_sysv_start(smx_process_t process); - -static void smx_ctx_sysv_stop(int exit_code); - -static void smx_ctx_sysv_swap(smx_process_t process); - -static void smx_ctx_sysv_schedule(smx_process_t process); - -static void smx_ctx_sysv_yield(void); - -static void smx_ctx_sysv_suspend(smx_process_t process); - -static void smx_ctx_sysv_resume(smx_process_t process); +static void smx_ctx_sysv_free(smx_context_t context); +static void smx_ctx_sysv_stop(smx_context_t context); +static void smx_ctx_sysv_suspend(smx_context_t context); +static void smx_ctx_sysv_resume(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) -{ - return simix_global->current_process->context->exception; -} - -/* callback: termination */ -static void xbt_ctx_sysv_ex_terminate(xbt_ex_t * e) -{ - xbt_ex_display(e); - 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); + smx_ctx_base_factory_init(factory); (*factory)->create_context = smx_ctx_sysv_factory_create_context; - (*factory)->finalize = smx_ctx_sysv_factory_finalize; - (*factory)->create_maestro_context = smx_ctx_sysv_factory_create_maestro_context; + /* Do not overload that method (*factory)->finalize */ (*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_ctx = xbt_ctx_sysv_ex_ctx; - __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_context(xbt_main_func_t code, int argc, char** argv, + void_f_pvoid_t cleanup_func, void* cleanup_arg) { - smx_ctx_sysv_t context = xbt_new0(s_smx_ctx_sysv_t, 1); + smx_ctx_sysv_t context = (smx_ctx_sysv_t)smx_ctx_base_factory_create_context_sized + (sizeof(s_smx_ctx_sysv_t), code,argc,argv,cleanup_func,cleanup_arg); - context->exception = xbt_new(ex_ctx_t, 1); - XBT_CTX_INITIALIZE(context->exception); + /* If the user provided a function for the process then use it + otherwise is the context for maestro */ + if(code){ - (*maestro)->context = (smx_context_t) context; + xbt_assert2(getcontext(&(context->uc)) == 0, + "Error in context saving: %d (%s)", errno, strerror(errno)); - return 0; + context->uc.uc_link = NULL; -} + context->uc.uc_stack.ss_sp = + pth_skaddr_makecontext(context->stack, STACK_SIZE); -static int smx_ctx_sysv_factory_finalize(smx_context_factory_t * factory) -{ - /*FIXME free(maestro_context->exception);*/ - free(*factory); - *factory = NULL; - return 0; -} + context->uc.uc_stack.ss_size = + pth_sksize_makecontext(context->stack, STACK_SIZE); -static int -smx_ctx_sysv_factory_create_context(smx_process_t *smx_process, xbt_main_func_t code) -{ - VERB1("Create context %s", (*smx_process)->name); - smx_ctx_sysv_t context = xbt_new0(s_smx_ctx_sysv_t, 1); - - context->code = code; - - xbt_assert2(getcontext(&(context->uc)) == 0, - "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, 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); + 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); - (*smx_process)->context = (smx_context_t)context; - (*smx_process)->iwannadie = 0; + makecontext(&((smx_ctx_sysv_t)context)->uc, smx_ctx_sysv_wrapper, 0); + } - /* FIXME: Check what should return */ - return 1; + return (smx_context_t)context; } -static void smx_ctx_sysv_free(smx_process_t process) -{ - smx_ctx_sysv_t context = (smx_ctx_sysv_t)process->context; - if (context){ +static void smx_ctx_sysv_free(smx_context_t context) { - if (context->exception) - free(context->exception); + if (context){ #ifdef HAVE_VALGRIND_VALGRIND_H VALGRIND_STACK_DEREGISTER(((smx_ctx_sysv_t) context)->valgrind_stack_id); #endif /* HAVE_VALGRIND_VALGRIND_H */ - /* destroy the context */ - free(context); } + smx_ctx_base_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); -} - -/** - * \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) -{ - 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); -} - -/** - * 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); +static void smx_ctx_sysv_stop(smx_context_t context) { + smx_ctx_base_stop(context); - smx_ctx_sysv_swap(simix_global->current_process); + smx_ctx_sysv_suspend(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"); + /*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; - if (((smx_ctx_sysv_t) process->context)->prev == NULL) - smx_ctx_sysv_resume(process); - else - smx_ctx_sysv_suspend(process); + (context->super.code) (context->super.argc, context->super.argv); - if (simix_global->current_process->iwannadie) - smx_ctx_sysv_stop(1); + smx_ctx_sysv_stop((smx_context_t)context); } -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)); -} - -static void smx_ctx_sysv_suspend(smx_process_t process) -{ - 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; +static void smx_ctx_sysv_suspend(smx_context_t context) { + ucontext_t maestro_ctx = ((smx_ctx_sysv_t)simix_global->maestro_process->context)->uc; - ((smx_ctx_sysv_t) process->context)->prev = NULL; - - rv = swapcontext(&(((smx_ctx_sysv_t) process->context)->uc), &(((smx_ctx_sysv_t)prev_process->context)->uc)); + int rv = swapcontext(&((smx_ctx_sysv_t) context)->uc, &maestro_ctx); xbt_assert0((rv == 0), "Context swapping failure"); } -static void smx_ctx_sysv_resume(smx_process_t process) -{ - 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; +static void +smx_ctx_sysv_resume(smx_context_t new_context) { + smx_ctx_sysv_t maestro = (smx_ctx_sysv_t)simix_global->maestro_process->context; - rv = swapcontext(&prev_context->uc, &new_context->uc); + int rv = swapcontext(&(maestro->uc), &((smx_ctx_sysv_t)new_context)->uc); xbt_assert0((rv == 0), "Context swapping failure"); }