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Starting point for command processing queue

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This commit is contained in:
Maas-Maarten Zeeman
2011-10-20 20:55:22 +02:00
parent 2ccdf4946b
commit 3a0eb12fd8
1 changed files with 14 additions and 12 deletions
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26
c_src/esqlite_nif.c
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@@ -1,8 +1,9 @@
/* /*
* esqlite -- an erlang sqlite nif. * Esqlite -- an erlang sqlite nif.
*/ */
#include <stdio.h> /* for debugging */ #include <stdio.h> /* for debugging */
#include <assert.h>
#include <erl_nif.h> #include <erl_nif.h>
#include "queue.h" #include "queue.h"
@@ -70,6 +71,8 @@ command_create()
cmd->type = cmd_unknown; cmd->type = cmd_unknown;
cmd->ref = 0; cmd->ref = 0;
return cmd;
} }
/* /*
@@ -98,18 +101,17 @@ esqlite_db_run(void *arg)
db->alive = 1; db->alive = 1;
/* Wait for incoming commands and execute them */
while(1) { while(1) {
cmd = get_command(db); cmd = queue_pop(db->commands);
/* We are stopping... */ /* We are stopping... */
if(cmd_stop == command->type) { if(cmd_stop == cmd->type) {
command_destroy(command); command_destroy(cmd);
break; break;
} }
/* Evaluate the command */ /* Evaluate the command */
switch(command->type) { switch(cmd->type) {
cmd_open: cmd_open:
/* do open */ /* do open */
break; break;
@@ -123,11 +125,12 @@ esqlite_db_run(void *arg)
assert(0 && "Invalid command"); assert(0 && "Invalid command");
} }
enif_send(NULL, &(command->pid), command->env, _atom_ok); enif_send(NULL, &(cmd->pid), cmd->env, _atom_ok);
command_destroy(command); command_destroy(cmd);
} }
db->alive = 0; db->alive = 0;
return NULL;
} }
/* /*
@@ -147,18 +150,17 @@ start_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
/* initialize the resource */ /* initialize the resource */
esqldb = enif_alloc_resource(esqlite_sqlite3_type, sizeof(esqlite_db)); esqldb = enif_alloc_resource(esqlite_sqlite3_type, sizeof(esqlite_db));
esqldb->db = NULL; esqldb->db = NULL;
esqldb->alive = 0;
/* Start the command processing thread */ /* Start the command processing thread */
esqldb->opts = enif_thread_opts_create("esqldb_thread_opts"); esqldb->opts = enif_thread_opts_create("esqldb_thread_opts");
if(enif_thread_create("", &esqldb->tid, esqlite_db_run, esqldb, esqldb->opts) != 0) { if(enif_thread_create("", &esqldb->tid, esqlite_db_run, esqldb, esqldb->opts) != 0) {
goto error; enif_release_resource(esqldb);
return enif_make_tuple2(env, _atom_error, _atom_ok);
} }
/* */ /* We got the resource... now return it */
esqlite_db = enif_make_resource(env, esqldb); esqlite_db = enif_make_resource(env, esqldb);
enif_release_resource(esqldb); enif_release_resource(esqldb);
return enif_make_tuple2(env, _atom_ok, esqlite_db); return enif_make_tuple2(env, _atom_ok, esqlite_db);
} }