diff options
Diffstat (limited to 'rubbos/app/httpd-2.0.64/server/mpm/mpmt_os2/mpmt_os2_child.c')
| -rw-r--r-- | rubbos/app/httpd-2.0.64/server/mpm/mpmt_os2/mpmt_os2_child.c | 497 |
1 files changed, 0 insertions, 497 deletions
diff --git a/rubbos/app/httpd-2.0.64/server/mpm/mpmt_os2/mpmt_os2_child.c b/rubbos/app/httpd-2.0.64/server/mpm/mpmt_os2/mpmt_os2_child.c deleted file mode 100644 index 1b47cae0..00000000 --- a/rubbos/app/httpd-2.0.64/server/mpm/mpmt_os2/mpmt_os2_child.c +++ /dev/null @@ -1,497 +0,0 @@ -/* Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You 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. - */ - -#define CORE_PRIVATE -#define INCL_NOPMAPI -#define INCL_DOS -#define INCL_DOSERRORS - -#include "ap_config.h" -#include "httpd.h" -#include "mpm_default.h" -#include "http_main.h" -#include "http_log.h" -#include "http_config.h" -#include "http_core.h" /* for get_remote_host */ -#include "http_connection.h" -#include "mpm.h" -#include "ap_mpm.h" -#include "ap_listen.h" -#include "apr_portable.h" -#include "apr_poll.h" -#include "mpm_common.h" -#include "apr_strings.h" -#include <os2.h> -#include <process.h> - -/* XXXXXX move these to header file private to this MPM */ - -/* We don't need many processes, - * they're only for redundancy in the event of a crash - */ -#define HARD_SERVER_LIMIT 10 - -/* Limit on the total number of threads per process - */ -#ifndef HARD_THREAD_LIMIT -#define HARD_THREAD_LIMIT 256 -#endif - -#define ID_FROM_CHILD_THREAD(c, t) ((c * HARD_THREAD_LIMIT) + t) - -typedef struct { - apr_pool_t *pconn; - apr_socket_t *conn_sd; -} worker_args_t; - -#define WORKTYPE_CONN 0 -#define WORKTYPE_EXIT 1 - -static apr_pool_t *pchild = NULL; -static int child_slot; -static int shutdown_pending = 0; -extern int ap_my_generation; -static int volatile is_graceful = 1; -HEV shutdown_event; /* signaled when this child is shutting down */ - -/* grab some MPM globals */ -extern int ap_min_spare_threads; -extern int ap_max_spare_threads; -extern HMTX ap_mpm_accept_mutex; - -static void worker_main(void *vpArg); -static void clean_child_exit(int code); -static void set_signals(); -static void server_maintenance(void *vpArg); - - -static void clean_child_exit(int code) -{ - if (pchild) { - apr_pool_destroy(pchild); - } - - exit(code); -} - - - -void ap_mpm_child_main(apr_pool_t *pconf) -{ - ap_listen_rec *lr = NULL; - ap_listen_rec *first_lr = NULL; - int requests_this_child = 0; - apr_socket_t *sd = ap_listeners->sd; - int nsds, rv = 0; - unsigned long ulTimes; - int my_pid = getpid(); - ULONG rc, c; - HQUEUE workq; - apr_pollfd_t *pollset; - int num_listeners; - TID server_maint_tid; - void *sb_mem; - - /* Stop Ctrl-C/Ctrl-Break signals going to child processes */ - DosSetSignalExceptionFocus(0, &ulTimes); - set_signals(); - - /* Create pool for child */ - apr_pool_create(&pchild, pconf); - - ap_run_child_init(pchild, ap_server_conf); - - /* Create an event semaphore used to trigger other threads to shutdown */ - rc = DosCreateEventSem(NULL, &shutdown_event, 0, FALSE); - - if (rc) { - ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, - "unable to create shutdown semaphore, exiting"); - clean_child_exit(APEXIT_CHILDFATAL); - } - - /* Gain access to the scoreboard. */ - rc = DosGetNamedSharedMem(&sb_mem, ap_scoreboard_fname, - PAG_READ|PAG_WRITE); - - if (rc) { - ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, - "scoreboard not readable in child, exiting"); - clean_child_exit(APEXIT_CHILDFATAL); - } - - ap_calc_scoreboard_size(); - ap_init_scoreboard(sb_mem); - - /* Gain access to the accpet mutex */ - rc = DosOpenMutexSem(NULL, &ap_mpm_accept_mutex); - - if (rc) { - ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, - "accept mutex couldn't be accessed in child, exiting"); - clean_child_exit(APEXIT_CHILDFATAL); - } - - /* Find our pid in the scoreboard so we know what slot our parent allocated us */ - for (child_slot = 0; ap_scoreboard_image->parent[child_slot].pid != my_pid && child_slot < HARD_SERVER_LIMIT; child_slot++); - - if (child_slot == HARD_SERVER_LIMIT) { - ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, - "child pid not found in scoreboard, exiting"); - clean_child_exit(APEXIT_CHILDFATAL); - } - - ap_my_generation = ap_scoreboard_image->parent[child_slot].generation; - memset(ap_scoreboard_image->servers[child_slot], 0, sizeof(worker_score) * HARD_THREAD_LIMIT); - - /* Set up an OS/2 queue for passing connections & termination requests - * to worker threads - */ - rc = DosCreateQueue(&workq, QUE_FIFO, apr_psprintf(pchild, "/queues/httpd/work.%d", my_pid)); - - if (rc) { - ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, - "unable to create work queue, exiting"); - clean_child_exit(APEXIT_CHILDFATAL); - } - - /* Create initial pool of worker threads */ - for (c = 0; c < ap_min_spare_threads; c++) { -// ap_scoreboard_image->servers[child_slot][c].tid = _beginthread(worker_main, NULL, 128*1024, (void *)c); - } - - /* Start maintenance thread */ - server_maint_tid = _beginthread(server_maintenance, NULL, 32768, NULL); - - /* Set up poll */ - for (num_listeners = 0, lr = ap_listeners; lr; lr = lr->next) { - num_listeners++; - } - - apr_poll_setup(&pollset, num_listeners, pchild); - - for (lr = ap_listeners; lr; lr = lr->next) { - apr_poll_socket_add(pollset, lr->sd, APR_POLLIN); - } - - /* Main connection accept loop */ - do { - apr_pool_t *pconn; - worker_args_t *worker_args; - - apr_pool_create(&pconn, pchild); - worker_args = apr_palloc(pconn, sizeof(worker_args_t)); - worker_args->pconn = pconn; - - if (num_listeners == 1) { - rv = apr_accept(&worker_args->conn_sd, ap_listeners->sd, pconn); - } else { - rc = DosRequestMutexSem(ap_mpm_accept_mutex, SEM_INDEFINITE_WAIT); - - if (shutdown_pending) { - DosReleaseMutexSem(ap_mpm_accept_mutex); - break; - } - - rv = APR_FROM_OS_ERROR(rc); - - if (rv == APR_SUCCESS) { - rv = apr_poll(pollset, num_listeners, &nsds, -1); - DosReleaseMutexSem(ap_mpm_accept_mutex); - } - - if (rv == APR_SUCCESS) { - if (first_lr == NULL) { - first_lr = ap_listeners; - } - - lr = first_lr; - - do { - apr_int16_t event; - - apr_poll_revents_get(&event, lr->sd, pollset); - - if (event == APR_POLLIN) { - apr_sockaddr_t *sa; - apr_port_t port; - apr_socket_addr_get(&sa, APR_LOCAL, lr->sd); - apr_sockaddr_port_get(&port, sa); - first_lr = lr->next; - break; - } - lr = lr->next; - - if (!lr) { - lr = ap_listeners; - } - } while (lr != first_lr); - - if (lr == first_lr) { - continue; - } - - sd = lr->sd; - rv = apr_accept(&worker_args->conn_sd, sd, pconn); - } - } - - if (rv != APR_SUCCESS) { - if (!APR_STATUS_IS_EINTR(rv)) { - ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, - "apr_accept"); - clean_child_exit(APEXIT_CHILDFATAL); - } - } else { - DosWriteQueue(workq, WORKTYPE_CONN, sizeof(worker_args_t), worker_args, 0); - requests_this_child++; - } - - if (ap_max_requests_per_child != 0 && requests_this_child >= ap_max_requests_per_child) - break; - } while (!shutdown_pending && ap_my_generation == ap_scoreboard_image->global->running_generation); - - ap_scoreboard_image->parent[child_slot].quiescing = 1; - DosPostEventSem(shutdown_event); - DosWaitThread(&server_maint_tid, DCWW_WAIT); - - if (is_graceful) { - char someleft; - - /* tell our worker threads to exit */ - for (c=0; c<HARD_THREAD_LIMIT; c++) { - if (ap_scoreboard_image->servers[child_slot][c].status != SERVER_DEAD) { - DosWriteQueue(workq, WORKTYPE_EXIT, 0, NULL, 0); - } - } - - do { - someleft = 0; - - for (c=0; c<HARD_THREAD_LIMIT; c++) { - if (ap_scoreboard_image->servers[child_slot][c].status != SERVER_DEAD) { - someleft = 1; - DosSleep(1000); - break; - } - } - } while (someleft); - } else { - DosPurgeQueue(workq); - - for (c=0; c<HARD_THREAD_LIMIT; c++) { - if (ap_scoreboard_image->servers[child_slot][c].status != SERVER_DEAD) { - DosKillThread(ap_scoreboard_image->servers[child_slot][c].tid); - } - } - } - - apr_pool_destroy(pchild); -} - - - -void add_worker() -{ - int thread_slot; - - /* Find a free thread slot */ - for (thread_slot=0; thread_slot < HARD_THREAD_LIMIT; thread_slot++) { - if (ap_scoreboard_image->servers[child_slot][thread_slot].status == SERVER_DEAD) { - ap_scoreboard_image->servers[child_slot][thread_slot].status = SERVER_STARTING; - ap_scoreboard_image->servers[child_slot][thread_slot].tid = - _beginthread(worker_main, NULL, 128*1024, (void *)thread_slot); - break; - } - } -} - - - -ULONG APIENTRY thread_exception_handler(EXCEPTIONREPORTRECORD *pReportRec, - EXCEPTIONREGISTRATIONRECORD *pRegRec, - CONTEXTRECORD *pContext, - PVOID p) -{ - int c; - - if (pReportRec->fHandlerFlags & EH_NESTED_CALL) { - return XCPT_CONTINUE_SEARCH; - } - - if (pReportRec->ExceptionNum == XCPT_ACCESS_VIOLATION || - pReportRec->ExceptionNum == XCPT_INTEGER_DIVIDE_BY_ZERO) { - ap_log_error(APLOG_MARK, APLOG_ERR, 0, ap_server_conf, - "caught exception in worker thread, initiating child shutdown pid=%d", getpid()); - for (c=0; c<HARD_THREAD_LIMIT; c++) { - if (ap_scoreboard_image->servers[child_slot][c].tid == _gettid()) { - ap_scoreboard_image->servers[child_slot][c].status = SERVER_DEAD; - break; - } - } - - /* Shut down process ASAP, it could be quite unhealthy & leaking resources */ - shutdown_pending = 1; - ap_scoreboard_image->parent[child_slot].quiescing = 1; - kill(getpid(), SIGHUP); - DosUnwindException(UNWIND_ALL, 0, 0); - } - - return XCPT_CONTINUE_SEARCH; -} - - - -static void worker_main(void *vpArg) -{ - long conn_id; - conn_rec *current_conn; - apr_pool_t *pconn; - apr_allocator_t *allocator; - apr_bucket_alloc_t *bucket_alloc; - worker_args_t *worker_args; - HQUEUE workq; - PID owner; - int rc; - REQUESTDATA rd; - ULONG len; - BYTE priority; - int thread_slot = (int)vpArg; - EXCEPTIONREGISTRATIONRECORD reg_rec = { NULL, thread_exception_handler }; - ap_sb_handle_t *sbh; - - /* Trap exceptions in this thread so we don't take down the whole process */ - DosSetExceptionHandler( ®_rec ); - - rc = DosOpenQueue(&owner, &workq, - apr_psprintf(pchild, "/queues/httpd/work.%d", getpid())); - - if (rc) { - ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, - "unable to open work queue, exiting"); - ap_scoreboard_image->servers[child_slot][thread_slot].tid = 0; - } - - conn_id = ID_FROM_CHILD_THREAD(child_slot, thread_slot); - ap_update_child_status_from_indexes(child_slot, thread_slot, SERVER_READY, - NULL); - - apr_allocator_create(&allocator); - apr_allocator_max_free_set(allocator, ap_max_mem_free); - bucket_alloc = apr_bucket_alloc_create_ex(allocator); - - while (rc = DosReadQueue(workq, &rd, &len, (PPVOID)&worker_args, 0, DCWW_WAIT, &priority, NULLHANDLE), - rc == 0 && rd.ulData != WORKTYPE_EXIT) { - pconn = worker_args->pconn; - ap_create_sb_handle(&sbh, pconn, child_slot, thread_slot); - current_conn = ap_run_create_connection(pconn, ap_server_conf, - worker_args->conn_sd, conn_id, - sbh, bucket_alloc); - - if (current_conn) { - ap_process_connection(current_conn, worker_args->conn_sd); - ap_lingering_close(current_conn); - } - - apr_pool_destroy(pconn); - ap_update_child_status_from_indexes(child_slot, thread_slot, - SERVER_READY, NULL); - } - - ap_update_child_status_from_indexes(child_slot, thread_slot, SERVER_DEAD, - NULL); - - apr_bucket_alloc_destroy(bucket_alloc); - apr_allocator_destroy(allocator); -} - - - -static void server_maintenance(void *vpArg) -{ - int num_idle, num_needed; - ULONG num_pending = 0; - int threadnum; - HQUEUE workq; - ULONG rc; - PID owner; - - rc = DosOpenQueue(&owner, &workq, - apr_psprintf(pchild, "/queues/httpd/work.%d", getpid())); - - if (rc) { - ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, - "unable to open work queue in maintenance thread"); - return; - } - - do { - for (num_idle=0, threadnum=0; threadnum < HARD_THREAD_LIMIT; threadnum++) { - num_idle += ap_scoreboard_image->servers[child_slot][threadnum].status == SERVER_READY; - } - - DosQueryQueue(workq, &num_pending); - num_needed = ap_min_spare_threads - num_idle + num_pending; - - if (num_needed > 0) { - for (threadnum=0; threadnum < num_needed; threadnum++) { - add_worker(); - } - } - - if (num_idle - num_pending > ap_max_spare_threads) { - DosWriteQueue(workq, WORKTYPE_EXIT, 0, NULL, 0); - } - } while (DosWaitEventSem(shutdown_event, 500) == ERROR_TIMEOUT); -} - - - -/* Signal handling routines */ - -static void sig_term(int sig) -{ - shutdown_pending = 1; - is_graceful = 0; - signal(SIGTERM, SIG_DFL); -} - - - -static void sig_hup(int sig) -{ - shutdown_pending = 1; - is_graceful = 1; -} - - - -static void set_signals() -{ - struct sigaction sa; - - sigemptyset(&sa.sa_mask); - sa.sa_flags = 0; - sa.sa_handler = sig_term; - - if (sigaction(SIGTERM, &sa, NULL) < 0) - ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGTERM)"); - - sa.sa_handler = sig_hup; - - if (sigaction(SIGHUP, &sa, NULL) < 0) - ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGHUP)"); -} |