diff options
Diffstat (limited to 'ipc/ipc_kmsg.h')
| -rw-r--r-- | ipc/ipc_kmsg.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/ipc/ipc_kmsg.h b/ipc/ipc_kmsg.h index b1eb06c7..45e174b7 100644 --- a/ipc/ipc_kmsg.h +++ b/ipc/ipc_kmsg.h @@ -102,6 +102,46 @@ extern ipc_kmsg_t ipc_kmsg_cache[NCPUS]; #define ikm_cache() ipc_kmsg_cache[cpu_number()] +#define ikm_cache_alloc_try() \ +MACRO_BEGIN \ + ipc_kmsg_t __kmsg = ikm_cache(); \ + if (__kmsg != IKM_NULL) { \ + ikm_cache() = IKM_NULL; \ + ikm_check_initialized(__kmsg, IKM_SAVED_KMSG_SIZE); \ + } \ + __kmsg; \ +MACRO_END + +#define ikm_cache_alloc() \ +MACRO_BEGIN \ + ipc_kmsg_t __kmsg = ikm_cache_alloc_try(); \ + if (!__kmsg) { \ + __kmsg = ikm_alloc(IKM_SAVED_MSG_SIZE); \ + if (__kmsg != IKM_NULL) \ + ikm_init(__kmsg, IKM_SAVED_MSG_SIZE); \ + } \ + __kmsg; \ +MACRO_END + +#define ikm_cache_free_try(kmsg) \ +MACRO_BEGIN \ + int __success = 0; \ + if (ikm_cache() == IKM_NULL) { \ + ikm_cache() = (kmsg); \ + __success = 1; \ + } \ + __success; \ +MACRO_END + +#define ikm_cache_free(kmsg) \ +MACRO_BEGIN \ + if (((kmsg)->ikm_size == IKM_SAVED_KMSG_SIZE) && \ + (ikm_cache() == IKM_NULL)) \ + ikm_cache() = (kmsg); \ + else \ + ikm_free(kmsg); \ +MACRO_END + /* * The size of the kernel message buffers that will be cached. * IKM_SAVED_KMSG_SIZE includes overhead; IKM_SAVED_MSG_SIZE doesn't. |