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/*
* Copyright (c) 2023 Lain Bailey <lain@obsproject.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "../util/darray.h"
#include "../util/threading.h"
#include "decl.h"
#include "proc.h"
struct proc_info {
struct decl_info func;
void *data;
proc_handler_proc_t callback;
};
static inline void proc_info_free(struct proc_info *pi)
{
decl_info_free(&pi->func);
}
struct proc_handler {
/* TODO: replace with hash table lookup? */
pthread_mutex_t mutex;
DARRAY(struct proc_info) procs;
};
static struct proc_info *getproc(proc_handler_t *handler, const char *name)
{
for (size_t i = 0; i < handler->procs.num; i++) {
struct proc_info *info = handler->procs.array + i;
if (strcmp(info->func.name, name) == 0) {
return info;
}
}
return NULL;
}
/* ------------------------------------------------------------------------- */
proc_handler_t *proc_handler_create(void)
{
struct proc_handler *handler = bmalloc(sizeof(struct proc_handler));
if (pthread_mutex_init_recursive(&handler->mutex) != 0) {
blog(LOG_ERROR, "Couldn't create proc_handler mutex");
bfree(handler);
return NULL;
}
da_init(handler->procs);
return handler;
}
void proc_handler_destroy(proc_handler_t *handler)
{
if (!handler)
return;
for (size_t i = 0; i < handler->procs.num; i++)
proc_info_free(handler->procs.array + i);
da_free(handler->procs);
pthread_mutex_destroy(&handler->mutex);
bfree(handler);
}
void proc_handler_add(proc_handler_t *handler, const char *decl_string, proc_handler_proc_t proc, void *data)
{
if (!handler)
return;
struct proc_info pi;
memset(&pi, 0, sizeof(struct proc_info));
if (!parse_decl_string(&pi.func, decl_string)) {
blog(LOG_ERROR, "Function declaration invalid: %s", decl_string);
return;
}
pi.callback = proc;
pi.data = data;
pthread_mutex_lock(&handler->mutex);
struct proc_info *existing = getproc(handler, pi.func.name);
if (existing) {
blog(LOG_WARNING, "Procedure '%s' already exists", pi.func.name);
proc_info_free(&pi);
} else {
da_push_back(handler->procs, &pi);
}
pthread_mutex_unlock(&handler->mutex);
}
bool proc_handler_call(proc_handler_t *handler, const char *name, calldata_t *params)
{
if (!handler)
return false;
pthread_mutex_lock(&handler->mutex);
struct proc_info *info = getproc(handler, name);
struct proc_info info_copy;
if (info)
info_copy = *info;
pthread_mutex_unlock(&handler->mutex);
if (!info)
return false;
info_copy.callback(info_copy.data, params);
return true;
}
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