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threads: Check w32threads dependencies at the configure stage

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Also add warning comment about threading implementations without matching
atomics implementation to the atomics fallback implementation.
This commit is contained in:
Diego Biurrun 2013-12-18 22:29:25 +01:00
parent 35b05c5184
commit 874c751cc5
2 changed files with 5 additions and 1 deletions
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1
configure vendored
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@ -1606,6 +1606,7 @@ atomics_gcc_if="sync_val_compare_and_swap"
atomics_suncc_if="atomic_cas_ptr machine_rw_barrier" atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
atomics_win32_if="MemoryBarrier" atomics_win32_if="MemoryBarrier"
atomics_native_if_any="$ATOMICS_LIST" atomics_native_if_any="$ATOMICS_LIST"
w32threads_deps="atomics_native"
threads_if_any="$THREADS_LIST" threads_if_any="$THREADS_LIST"
# subsystems # subsystems

5
libavutil/atomic.c
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@ -97,8 +97,11 @@ void *avpriv_atomic_ptr_cas(void * volatile *ptr, void *oldval, void *newval)
return *ptr; return *ptr;
} }
#else #else /* HAVE_THREADS */
/* This should never trigger, unless a new threading implementation
* without correct atomics dependencies in configure or a corresponding
* atomics implementation is added. */
#error "Threading is enabled, but there is no implementation of atomic operations available" #error "Threading is enabled, but there is no implementation of atomic operations available"
#endif /* HAVE_PTHREADS */ #endif /* HAVE_PTHREADS */