size_t __pnacl_irt_interface_wrapper(const char *interface_ident,
void *table, size_t tablesize) {
if (!is_irt_interface_whitelisted(interface_ident))
return 0;
if (0 != mystrcmp(interface_ident, NACL_IRT_PPAPIHOOK_v0_1)) {
return (*__pnacl_real_irt_interface)(interface_ident, table, tablesize);
}
if ((*__pnacl_real_irt_interface)(NACL_IRT_PPAPIHOOK_v0_1,
&real_irt_ppapi_hook,
sizeof real_irt_ppapi_hook) !=
sizeof real_irt_ppapi_hook) {
return 0;
}
struct nacl_irt_ppapihook *dest = table;
if (sizeof *dest <= tablesize) {
dest->ppapi_start = wrap_ppapi_start;
dest->ppapi_register_thread_creator =
real_irt_ppapi_hook.ppapi_register_thread_creator;
return sizeof *dest;
}
return 0;
}
size_t __pnacl_irt_interface_wrapper(const char *interface_ident,
void *table, size_t tablesize) {
if (!is_irt_interface_whitelisted(interface_ident))
return 0;
/*
* Note there is a benign race in initializing the wrapper.
* We build the "hook" structure by copying from the IRT's hook and then
* writing our wrapper for the ppapi method. Two threads may end up
* attempting to do this simultaneously, which should not be a problem,
* as they are writing the same values.
*/
if (0 != mystrcmp(interface_ident, NACL_IRT_PPAPIHOOK_v0_1)) {
/*
* The interface is not wrapped, so use the real interface.
*/
return (*__pnacl_real_irt_interface)(interface_ident, table, tablesize);
}
if ((*__pnacl_real_irt_interface)(NACL_IRT_PPAPIHOOK_v0_1,
&real_irt_ppapi_hook,
sizeof real_irt_ppapi_hook) !=
sizeof real_irt_ppapi_hook) {
return 0;
}
/*
* Copy the interface structure into the client.
*/
struct nacl_irt_ppapihook *dest = table;
if (sizeof *dest <= tablesize) {
dest->ppapi_start = wrap_ppapi_start;
dest->ppapi_register_thread_creator =
real_irt_ppapi_hook.ppapi_register_thread_creator;
return sizeof *dest;
}
return 0;
}
