1 #include <libkern/libkern.h>
2 #include <libkern/section_keywords.h>
3 #include <libkern/compression/compression.h>
4 
5 #if defined(SECURITY_READ_ONLY_LATE)
6 SECURITY_READ_ONLY_LATE(const compression_ki_t*) compression_ki_ptr = NULL;
7 static SECURITY_READ_ONLY_LATE(registration_callback_t) registration_callback = NULL;
8 #else
9 const compression_ki_t* compression_ki_ptr = NULL;
10 static registration_callback_t registration_callback = NULL;
11 #endif
12 
13 void
compression_interface_register(const compression_ki_t * ki)14 compression_interface_register(const compression_ki_t *ki)
15 {
16 	if (compression_ki_ptr) {
17 		panic("compression interface already set");
18 	}
19 
20 	compression_ki_ptr = ki;
21 
22 	if (registration_callback) {
23 		registration_callback();
24 	}
25 }
26 
27 void
compression_interface_set_registration_callback(registration_callback_t callback)28 compression_interface_set_registration_callback(registration_callback_t callback)
29 {
30 	if (callback && registration_callback) {
31 		panic("compression interface registration callback is already set");
32 	}
33 
34 	registration_callback = callback;
35 }
36