diff options
Diffstat (limited to 'src/vnet/mfib/mfib_signal.c')
| -rw-r--r-- | src/vnet/mfib/mfib_signal.c | 55 |
1 files changed, 34 insertions, 21 deletions
diff --git a/src/vnet/mfib/mfib_signal.c b/src/vnet/mfib/mfib_signal.c index 9f6205de419..cd486da32f8 100644 --- a/src/vnet/mfib/mfib_signal.c +++ b/src/vnet/mfib/mfib_signal.c @@ -68,6 +68,28 @@ mfib_signal_module_init (void) mfib_signal_list_init(); } +static inline void +mfib_signal_lock_aquire (void) +{ + while (__sync_lock_test_and_set (&mfib_signal_pending.mip_lock, 1)) + ; +} + +static inline void +mfib_signal_lock_release (void) +{ + mfib_signal_pending.mip_lock = 0; +} + +#define MFIB_SIGNAL_CRITICAL_SECTION(_body) \ +{ \ + mfib_signal_lock_aquire(); \ + do { \ + _body; \ + } while (0); \ + mfib_signal_lock_release(); \ +} + int mfib_signal_send_one (struct _unix_shared_memory_queue *q, u32 context) @@ -77,13 +99,11 @@ mfib_signal_send_one (struct _unix_shared_memory_queue *q, /* * with the lock held, pop a signal from the q. */ - while (__sync_lock_test_and_set (&mfib_signal_pending.mip_lock, 1)) - ; - { + MFIB_SIGNAL_CRITICAL_SECTION( + ({ li = clib_dlist_remove_head(mfib_signal_dlist_pool, mfib_signal_pending.mip_head); - } - mfib_signal_pending.mip_lock = 0; + })); if (~0 != li) { @@ -106,13 +126,11 @@ mfib_signal_send_one (struct _unix_shared_memory_queue *q, /* * with the lock held, return the resoruces of the signals posted */ - while (__sync_lock_test_and_set(&mfib_signal_pending.mip_lock, 1)) - ; - { + MFIB_SIGNAL_CRITICAL_SECTION( + ({ pool_put_index(mfib_signal_pool, si); pool_put_index(mfib_signal_dlist_pool, li); - } - mfib_signal_pending.mip_lock = 0; + })); return (1); } @@ -128,9 +146,8 @@ mfib_signal_push (const mfib_entry_t *mfe, dlist_elt_t *elt; u32 si, li; - while (__sync_lock_test_and_set (&mfib_signal_pending.mip_lock, 1)) - ; - { + MFIB_SIGNAL_CRITICAL_SECTION( + ({ pool_get(mfib_signal_pool, mfs); pool_get(mfib_signal_dlist_pool, elt); @@ -143,8 +160,7 @@ mfib_signal_push (const mfib_entry_t *mfe, clib_dlist_addhead(mfib_signal_dlist_pool, mfib_signal_pending.mip_head, li); - } - mfib_signal_pending.mip_lock = 0; + })); mfs->mfs_entry = mfib_entry_get_index(mfe); mfs->mfs_itf = mfib_itf_get_index(mfi); @@ -179,9 +195,8 @@ mfib_signal_remove_itf (const mfib_itf_t *mfi) /* * it's in the pending q */ - while (__sync_lock_test_and_set (&mfib_signal_pending.mip_lock, 1)) - ; - { + MFIB_SIGNAL_CRITICAL_SECTION( + ({ dlist_elt_t *elt; /* @@ -194,8 +209,6 @@ mfib_signal_remove_itf (const mfib_itf_t *mfi) elt = pool_elt_at_index(mfib_signal_dlist_pool, li); pool_put_index(mfib_signal_pool, elt->value); pool_put(mfib_signal_dlist_pool, elt); - } - - mfib_signal_pending.mip_lock = 0; + })); } } |