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Add load balancer support to the scoreboard in preparation for

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load balancing support in mod_proxy.
PR:
Obtained from:
Submitted by:	Mladen Turk <mturk@apache.org>
Reviewed by:


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@104404 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Graham Leggett
2004-07-28 22:50:54 +00:00
parent 4b94180d20
commit e548632412
3 changed files with 64 additions and 2 deletions
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18
include/scoreboard.h
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@ -32,6 +32,7 @@ extern "C" {
#include "apr_thread_proc.h"
#include "apr_portable.h"
#include "apr_shm.h"
#include "apr_optional.h"
/* Scoreboard file, if there is one */
#ifndef DEFAULT_SCOREBOARD
@ -118,6 +119,7 @@ struct worker_score {
typedef struct {
int server_limit;
int thread_limit;
int lb_limit;
ap_scoreboard_e sb_type;
ap_generation_t running_generation; /* the generation of children which
* should still be serving requests. */
@ -135,6 +137,13 @@ struct process_score{
*/
};
/* stuff which is lb specific */
typedef struct lb_score lb_score;
struct lb_score{
/* TODO: make a real stuct from this */
unsigned char data[1024];
};
/* Scoreboard is now in 'local' memory, since it isn't updated once created,
* even in forked architectures. Child created-processes (non-fork) will
* set up these indicies into the (possibly relocated) shmem records.
@ -143,6 +152,7 @@ typedef struct {
global_score *global;
process_score *parent;
worker_score **servers;
lb_score **balancers;
} scoreboard;
typedef struct ap_sb_handle_t ap_sb_handle_t;
@ -168,6 +178,7 @@ void ap_time_process_request(int child_num, int thread_num, int status);
AP_DECLARE(worker_score *) ap_get_scoreboard_worker(int x, int y);
AP_DECLARE(process_score *) ap_get_scoreboard_process(int x);
AP_DECLARE(global_score *) ap_get_scoreboard_global(void);
AP_DECLARE(lb_score *) ap_get_scoreboard_lb(int child_num, int lb_num);
AP_DECLARE_DATA extern scoreboard *ap_scoreboard_image;
AP_DECLARE_DATA extern const char *ap_scoreboard_fname;
@ -185,6 +196,13 @@ AP_DECLARE_DATA extern ap_generation_t volatile ap_my_generation;
*/
AP_DECLARE_HOOK(int, pre_mpm, (apr_pool_t *p, ap_scoreboard_e sb_type))
/**
* proxy load balancer
* @return the number of load balancer workers.
*/
APR_DECLARE_OPTIONAL_FN(int, ap_proxy_lb_workers,
(void));
/* for time_process_request() in http_main.c */
#define START_PREQUEST 1
#define STOP_PREQUEST 2