HP-UX

hi,
i am having problem loading multiple shared libraries. if i load, make call to exposed method and then unload them, everything workds fine, but i have to keep the loaded images in memory,

i am uploading the prog. as loader.zip, it contains

loader - loader.c which loads c++ shared libraries service1.sl, service2.sl and service3.sl into memory and initilises them

support - a c++ archive library which contains the common support needed for all the services, the loader makes call to a exposed method in support.cpp, HookFun namely..

support.h has a macro defines as EXT_INTERFACE which is smart, when a service says EXT_INTERFACE('servicename'), it expands to something like this

long interface(){
servicename serviceinstance;
servicename.CallService();
}

and the HookFun makes and instance of support class which inturn calls interface(), where an instance the required service is created.

services/service* - services, shared libraries build using the support archive, and loaded by the loader

problem:
case 1)
when i load service1, make a call to initilize the service and then unload it, load service 2 make a call and then unload it, ....

everything is fine.

case 2) if i load service1, make a call to initilize the service (dont unload it), load service 2 make a call to initilize it, but this time service 1 is getting initilized again, service 1 is initilized as many services are there..

(my requirement is that i have to keep all the serivces in mermory at the same time)

output for first case:

The address of the loaded function is 2139010832
the buffer content is service1.sl
got addre for proc and it is 2138878086
Dispatch function called with name service1.sl
Support initilizing
Initilizing class service 1
Service called for service1
The address of the loaded function is 2139010832
the buffer content is service2.sl
got addre for proc and it is 2138878070
Dispatch function called with name service2.sl
Support initilizing
Initilizing class service 2
Service called for service 2
The address of the loaded function is 2139010832
the buffer content is service3.sl
got addre for proc and it is 2138878086
Dispatch function called with name service3.sl
Support initilizing
Initilizing class service 3
Service called for service 3

output for second case: (removed shl_unload)
The address of the loaded function is 2139010832
the buffer content is service1.sl
got addre for proc and it is 2138878086
Dispatch function called with name service1.sl
Support initilizing
Initilizing class service 1
Service called for service1
The address of the loaded function is 2139012144
the buffer content is service2.sl
got addre for proc and it is 2139003802
Dispatch function called with name service2.sl
Support initilizing
Initilizing class service 1
Service called for service1
The address of the loaded function is 2139012472
the buffer content is service3.sl
got addre for proc and it is 2139004250
Dispatch function called with name service3.sl
Support initilizing
Initilizing class service 1
Service called for service1

the code i have attached is very simple, please let me know where i am going wrong.. i am executing the program on hpux 10.0 machine and it is patches properly.

thankx in advance

Are you explicitly exporting your symbols from the shared libraries and ensuring all other symbols are hidden?

Do you have classes with the same names in each of the shared libraries?

Can you link it all together as one static application and prove it works like that?

using the following flags while loading the library will solve the above problem
BIND_DEFERRED | DYNAMIC_PATH | BIND_RESTRICTED | BIND_FIRST

you can get more details abt the flags from hpux site.. but nowhere it says that these flags will solve the above problem.