Pb with module initialization

Vladimir Shebordaev vshebordaev at mail.ru
Fri Aug 17 12:55:30 UTC 2012

2012/8/17 MAGNIEN, Thierry <thierry.magnien at sfr.com>:
> Hi and thanks for your answer.
>> A shared memory zone has a constructor, namely, init() method in
>> ngx_shm_zone_t. This method is invoked by ngx_init_cycle() when the
>> configuration is already processed and the shared memory zones are
>> about to be (re)initialized, so I guess you can accees both your
>> directives and the actual shm zone data from there. See file cache
>> initialization routine ngx_http_file_cache_init() in
>> src/http/ngx_http_file_cache.c for an example.
> Well, I have such an init method but its arguments are only (ngx_shm_zone_t *shm_zone, void *data). I suppose I must use ngx_get_conf but what arguments should I give to it ?

You can access your module main configuration with
ngx_http_cycle_get_module_main_conf()  through the global ngx_cycle
that has the module contexts already set up by the shm initialization
time. You can also access the configuration from the module
init_process() method that is explicitly given the cycle. Either way,
you can pass any parameters you need to the shm zone constructor
through the zone data field that is to be installed right after the
shm zone is added  at the module configuration time.


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