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MINOR: threads: add a portable barrier for threads and non-threads

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HA_BARRIER() is just a simple memory barrier to prevent the compiler
from reordering our code.
This commit is contained in:
Willy Tarreau 2017-10-31 18:00:20 +01:00
parent 2510f702f9
commit b29dc95a97
1 changed files with 3 additions and 0 deletions
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3
include/common/hathreads.h
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@ -60,6 +60,7 @@ extern THREAD_LOCAL unsigned int tid_bit; /* The bit corresponding to the thread
*(val); \ *(val); \
}) })
#define HA_BARRIER() do { } while (0)
#define THREAD_SYNC_INIT(m) do { /* do nothing */ } while(0) #define THREAD_SYNC_INIT(m) do { /* do nothing */ } while(0)
#define THREAD_SYNC_ENABLE() do { /* do nothing */ } while(0) #define THREAD_SYNC_ENABLE() do { /* do nothing */ } while(0)
@ -118,6 +119,8 @@ extern THREAD_LOCAL unsigned int tid_bit; /* The bit corresponding to the thread
(*val); \ (*val); \
}) })
#define HA_BARRIER() pl_barrier()
#define THREAD_SYNC_INIT(m) thread_sync_init(m) #define THREAD_SYNC_INIT(m) thread_sync_init(m)
#define THREAD_SYNC_ENABLE() thread_sync_enable() #define THREAD_SYNC_ENABLE() thread_sync_enable()
#define THREAD_WANT_SYNC() thread_want_sync() #define THREAD_WANT_SYNC() thread_want_sync()