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sim: add framework for declaring init callbacks locally

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To facilitate decentralized module initialization/registration with an
eye towards multi-target support, add a framework to detect init calls
declared in the source and automatically call them.  This is akin to
gdb's _initialize_xxx framework for letting modules autodiscover.
This commit is contained in:
Mike Frysinger
2016-01-02 10:50:46 -05:00
parent d113096b47
commit 8e5f151657
4 changed files with 74 additions and 16 deletions
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51
sim/common/sim-module.c
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@@ -38,8 +38,9 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <stdlib.h>
/* List of all modules. */
static MODULE_INSTALL_FN * const modules[] = {
/* List of all early/core modules.
TODO: Should trim this list by converting to sim_install_* framework. */
static MODULE_INSTALL_FN * const early_modules[] = {
standard_install,
sim_events_install,
sim_model_install,
@@ -63,8 +64,12 @@ static MODULE_INSTALL_FN * const modules[] = {
/* TODO: Shouldn't have device models here. */
dv_sockser_install,
#endif
0
};
static int early_modules_len = ARRAY_SIZE (early_modules);
/* List of dynamically detected modules. Declared in generated modules.c. */
extern MODULE_INSTALL_FN * const sim_modules_detected[];
extern const int sim_modules_detected_len;
/* Functions called from sim_open. */
@@ -92,11 +97,13 @@ sim_pre_argv_init (SIM_DESC sd, const char *myname)
sim_config_default (sd);
/* Install all configured in modules. */
/* Install all early configured-in modules. */
if (sim_module_install (sd) != SIM_RC_OK)
return SIM_RC_FAIL;
return SIM_RC_OK;
/* Install all remaining dynamically detected modules. */
return sim_module_install_list (sd, sim_modules_detected,
sim_modules_detected_len);
}
/* Initialize common parts after argument processing. */
@@ -121,6 +128,29 @@ sim_post_argv_init (SIM_DESC sd)
return SIM_RC_OK;
}
/* Install a list of modules.
If this fails, no modules are left installed. */
SIM_RC
sim_module_install_list (SIM_DESC sd, MODULE_INSTALL_FN * const *modules,
size_t modules_len)
{
size_t i;
for (i = 0; i < modules_len; ++i)
{
MODULE_INSTALL_FN *modp = modules[i];
if (modp != NULL && modp (sd) != SIM_RC_OK)
{
sim_module_uninstall (sd);
SIM_ASSERT (STATE_MODULES (sd) == NULL);
return SIM_RC_FAIL;
}
}
return SIM_RC_OK;
}
/* Install all modules.
If this fails, no modules are left installed. */
@@ -133,16 +163,7 @@ sim_module_install (SIM_DESC sd)
SIM_ASSERT (STATE_MODULES (sd) == NULL);
STATE_MODULES (sd) = ZALLOC (struct module_list);
for (modp = modules; *modp != NULL; ++modp)
{
if ((*modp) (sd) != SIM_RC_OK)
{
sim_module_uninstall (sd);
SIM_ASSERT (STATE_MODULES (sd) == NULL);
return SIM_RC_FAIL;
}
}
return SIM_RC_OK;
return sim_module_install_list (sd, early_modules, early_modules_len);
}
/* Called after all modules have been installed and after argv