diff options
Diffstat (limited to 'src/fluent-bit/lib/monkey/mk_server/mk_http_thread.c')
-rw-r--r-- | src/fluent-bit/lib/monkey/mk_server/mk_http_thread.c | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/src/fluent-bit/lib/monkey/mk_server/mk_http_thread.c b/src/fluent-bit/lib/monkey/mk_server/mk_http_thread.c new file mode 100644 index 000000000..d3c606f3a --- /dev/null +++ b/src/fluent-bit/lib/monkey/mk_server/mk_http_thread.c @@ -0,0 +1,290 @@ +/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ + +/* Monkey HTTP Server + * ================== + * Copyright 2001-2016 Monkey Software LLC <eduardo@monkey.io> + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <monkey/mk_info.h> +#include <monkey/mk_plugin.h> +#include <monkey/mk_thread.h> +#include <monkey/mk_net.h> +#include <monkey/mk_vhost.h> +#include <monkey/mk_http_thread.h> + +#include <stdlib.h> + +/* + * libco do not support parameters in the entrypoint function due to the + * complexity of implementation in terms of architecture and compiler, but + * it provide a workaround using a global structure as a middle entry-point + * that achieve the same stuff. + */ +struct mk_http_libco_params { + int type; + struct mk_vhost_handler *handler; + struct mk_http_session *session; + struct mk_http_request *request; + int n_params; + struct mk_list *params; + struct mk_thread *th; +}; + +pthread_once_t mk_http_thread_initialize_tls_once_flag = PTHREAD_ONCE_INIT; + +MK_TLS_DEFINE(struct mk_http_libco_params, mk_http_thread_libco_params); +MK_TLS_DEFINE(struct mk_thread, mk_thread); + +/* This function could return NULL if the process runs out of memory, in that + * case failure is imminent. + */ +static inline struct mk_http_libco_params *thread_get_libco_params() +{ + struct mk_http_libco_params *libco_params; + + libco_params = MK_TLS_GET(mk_http_thread_libco_params); + + if (libco_params == NULL) { + libco_params = mk_mem_alloc_z(sizeof(struct mk_http_libco_params)); + + if (libco_params == NULL) { + mk_err("libco thread params could not be allocated."); + } + + MK_TLS_SET(mk_http_thread_libco_params, libco_params); + } + + return libco_params; +} + +static void mk_http_thread_initialize_tls_once() +{ + MK_TLS_INIT(mk_http_thread_libco_params); + MK_TLS_INIT(mk_thread); +} + +void mk_http_thread_initialize_tls() +{ + pthread_once(&mk_http_thread_initialize_tls_once_flag, + mk_http_thread_initialize_tls_once); +} + +static inline void thread_cb_init_vars() +{ + struct mk_http_libco_params *libco_params; + struct mk_vhost_handler *handler; + struct mk_http_session *session; + struct mk_http_request *request; + int close; + int type; + struct mk_http_thread *mth; + struct mk_thread *th; + + libco_params = thread_get_libco_params(); + + type = libco_params->type; + handler = libco_params->handler; + session = libco_params->session; + request = libco_params->request; + th = libco_params->th; + + /* + * Until this point the th->callee already set the variables, so we + * wait until the core wanted to resume so we really trigger the + * output callback. + */ + co_switch(th->caller); + + if (type == MK_HTTP_THREAD_LIB) { + /* Invoke the handler callback */ + handler->cb(request, handler->data); + + /* + * Once the callback finished, we need to sanitize the connection + * so other further requests can be processed. + */ + int ret; + struct mk_sched_worker *sched; + struct mk_channel *channel; + + channel = request->session->channel; + sched = mk_sched_get_thread_conf(); + + MK_EVENT_NEW(channel->event); + ret = mk_event_add(sched->loop, + channel->fd, + MK_EVENT_CONNECTION, + MK_EVENT_READ, channel->event); + if (ret == -1) { + //return -1; + } + + /* Save temporal session */ + mth = request->thread; + + /* + * Finalize request internally, if ret == -1 means we should + * ask to shutdown the connection. + */ + ret = mk_http_request_end(session, session->server); + if (ret == -1) { + close = MK_TRUE; + } + else { + close = MK_FALSE; + } + mk_http_thread_purge(mth, close); + + /* Return control to caller */ + mk_thread_yield(th); + } + else if (type == MK_HTTP_THREAD_PLUGIN) { + /* FIXME: call plugin handler callback with params */ + } +} + +static inline void thread_params_set(struct mk_thread *th, + int type, + struct mk_vhost_handler *handler, + struct mk_http_session *session, + struct mk_http_request *request, + int n_params, + struct mk_list *params) +{ + struct mk_http_libco_params *libco_params; + + libco_params = thread_get_libco_params(); + + /* Callback parameters in order */ + libco_params->type = type; + libco_params->handler = handler; + libco_params->session = session; + libco_params->request = request; + libco_params->n_params = n_params; + libco_params->params = params; + libco_params->th = th; + + co_switch(th->callee); +} + +struct mk_http_thread *mk_http_thread_create(int type, + struct mk_vhost_handler *handler, + struct mk_http_session *session, + struct mk_http_request *request, + int n_params, + struct mk_list *params) +{ + size_t stack_size; + struct mk_thread *th = NULL; + struct mk_http_thread *mth; + struct mk_sched_worker *sched; + + sched = mk_sched_get_thread_conf(); + if (!sched) { + return NULL; + } + + th = mk_thread_new(sizeof(struct mk_http_thread), NULL); + if (!th) { + return NULL; + } + + mth = (struct mk_http_thread *) MK_THREAD_DATA(th); + if (!mth) { + return NULL; + } + + mth->session = session; + mth->request = request; + mth->parent = th; + mth->close = MK_FALSE; + request->thread = mth; + mk_list_add(&mth->_head, &sched->threads); + + th->caller = co_active(); + th->callee = co_create(MK_THREAD_STACK_SIZE, + thread_cb_init_vars, &stack_size); + +#ifdef MK_HAVE_VALGRIND + th->valgrind_stack_id = VALGRIND_STACK_REGISTER(th->callee, + ((char *)th->callee) + stack_size); +#endif + + /* Workaround for makecontext() */ + thread_params_set(th, type, handler, session, request, n_params, params); + + return mth; +} + +/* + * Move a http thread context from sched->thread to sched->threads_purge list. + * On this way the scheduler will release or reasign the resource later. + */ +int mk_http_thread_purge(struct mk_http_thread *mth, int close) +{ + struct mk_sched_worker *sched; + + sched = mk_sched_get_thread_conf(); + if (!sched) { + return -1; + } + + mth->close = close; + mk_list_del(&mth->_head); + mk_list_add(&mth->_head, &sched->threads_purge); + + return 0; +} + +int mk_http_thread_destroy(struct mk_http_thread *mth) +{ + struct mk_thread *th; + + /* Unlink from scheduler thread list */ + mk_list_del(&mth->_head); + + /* release original memory context */ + th = mth->parent; + mth->session->channel->event->type = MK_EVENT_CONNECTION; + mk_thread_destroy(th); + + return 0; +} + +int mk_http_thread_event(struct mk_event *event) +{ + struct mk_sched_conn *conn = (struct mk_sched_conn *) event; + + /* + struct mk_thread *th; + struct mk_http_thread *mth; + + th = conn->channel.thread; + mth = (struct mk_http_thread *) MK_THREAD_DATA(th); + */ + + mk_thread_resume(conn->channel.thread); + return 0; +} + +/* + * Start the co-routine: invoke coroutine callback and start processing + * data flush requests. + */ +int mk_http_thread_start(struct mk_http_thread *mth) +{ + mk_http_thread_resume(mth); + return 0; +} |