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#include "soul.h"
#include <ctype.h>
#include <dlfcn.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
/* Utility function for showing the marshalled states as hex code */
static void shx(uint8_t *state, uint32_t sz)
{
uint32_t i = 0;
while (i < sz) {
for (int j = 0; j < 16; ++j) {
if (i < sz) {
printf("%02x ", (unsigned int)state[i]);
}
else {
printf(" ");
}
++i;
}
i -= 16;
printf(" ");
for (int j = 0; j < 16; ++j) {
if (i < sz) {
if (isprint(state[i]) && !isspace(state[i])) {
printf("%c", state[i]);
}
else {
printf(".");
}
}
else {
printf(" ");
}
++i;
}
printf("\n");
}
}
int load_soul_from_dl_(dlhandle_t dl, soul_t *soul);
static void lock(soul_t *soul) { pthread_mutex_lock(&soul->lock); };
static void unlock(soul_t *soul) { pthread_mutex_unlock(&soul->lock); };
static int load_soul_from_file_(int argc, char **argv, const char *filename,
soul_t *soul)
{
dlhandle_t lib = dlopen(filename, RTLD_NOW | RTLD_GLOBAL);
int ec = 0;
if (!lib) {
fprintf(stderr, "Failed to open library: %s: %s\n", filename, dlerror());
ec = 1;
goto end;
}
printf("Loading file.\n");
ec = load_soul_from_dl_(lib, soul);
if (ec) {
goto end;
}
strncpy(soul->filename, filename, sizeof(soul->filename));
soul->argc = argc;
soul->argv = argv;
soul->arksoul_export_load(soul->argc, soul->argv);
end:
return ec;
}
static void maybe_run_metaload(int argc, char **argv, soul_t *soul)
{
static char *loaded_souls[12];
int i;
for (i = 0; i < 12 && loaded_souls[i]; ++i) {
if (strcmp(loaded_souls[i], soul->soul_name) == 0) {
return; // Soul is already loaded
}
}
loaded_souls[i] = strdup(soul->soul_name);
printf("First time loading %s, running metaload.\n", soul->soul_name);
if (soul->arksoul_export_metaload) {
soul->arksoul_export_metaload(argc, argv);
}
}
int load_soul_from_file(int argc, char **argv, const char *filename,
soul_t *soul)
{
memset(soul, 0, sizeof(*soul));
pthread_mutexattr_t attr;
if (pthread_mutexattr_init(&attr)) {
perror("pthread_mutexattr_init");
return 1;
}
if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE)) {
perror("pthread_mutexattr_settype");
return 1;
}
if (pthread_mutex_init(&soul->lock, &attr)) {
pthread_mutexattr_destroy(&attr);
perror("pthread_mutexattr_init");
return 1;
}
pthread_mutexattr_destroy(&attr);
int rc = load_soul_from_file_(argc, argv, filename, soul);
if (rc == 0) {
maybe_run_metaload(argc, argv, soul);
}
return rc;
}
int soul_hot_reload_same_state(soul_t *soul)
{
char filename_cpy[PATH_MAX];
strncpy(filename_cpy, soul->filename, sizeof(filename_cpy));
return soul_hot_reload(soul->argc, soul->argv, filename_cpy, soul);
}
int soul_hot_reload(int argc, char **argv, const char *filepath, soul_t *soul)
{
int ec = 0;
uint32_t sz = 0;
uint8_t *marshalled_state = NULL;
printf("Hot Reloading %s\n", soul->soul_name);
lock(soul);
printf("Marshalling state ...\n");
marshalled_state = soul->arksoul_export_preserve(soul->state, &sz);
printf("Calling teardown ...\n");
soul->arksoul_export_release(soul->state);
printf("State Marshalled:\n");
shx(marshalled_state, sz);
printf("Unloading old library handle.\n");
if (dlclose(soul->library_handle)) {
printf("Could not close library handle: %s\n", dlerror());
}
if ((ec = load_soul_from_file_(argc, argv, filepath, soul))) {
goto fail;
}
printf("Hot starting soul ...\n");
soul->state = soul->arksoul_export_rebirth(soul, marshalled_state, sz);
fail:
free(marshalled_state);
unlock(soul);
return ec;
}
void soul_run_requested_actions(soul_t *soul)
{
lock(soul);
requested_action_t requested_actions[MAX_QUEUED_ACTIONS];
size_t n_requested_actions = soul->n_requested_actions;
memcpy(&requested_actions, soul->requested_actions,
sizeof(requested_actions));
soul->n_requested_actions = 0;
unlock(soul);
size_t i;
for (i = 0; i < n_requested_actions; ++i) {
requested_actions[i].action(soul, requested_actions[i].str_arg);
if (requested_actions[i].arg_dtor) {
requested_actions[i].arg_dtor(requested_actions[i].ptr_arg);
}
}
}
void soul_cold_start(soul_t *soul)
{
lock(soul);
soul->state = soul->arksoul_export_ensoul(soul);
unlock(soul);
}
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