Hi,
On Tue, Dec 20, 2011 at 5:02 PM, Janne Grunau <[email protected]>wrote:
> Uses the non-standard value _SC_NPROCESSORS_ONLN for sysconf() to
> determine the number of CPUs.
> ---
> configure | 2 ++
> libavcodec/pthread.c | 12 ++++++++++++
> 2 files changed, 14 insertions(+), 0 deletions(-)
>
> diff --git a/configure b/configure
> index 180578d..3871a5b 100755
> --- a/configure
> +++ b/configure
> @@ -1136,6 +1136,7 @@ HAVE_LIST="
> symver
> symver_asm_label
> symver_gnu_asm
> + sysconf
> sys_mman_h
> sys_resource_h
> sys_select_h
> @@ -2855,6 +2856,7 @@ check_func setrlimit
> check_func strerror_r
> check_func strptime
> check_func strtok_r
> +check_func sysconf
> check_func_headers io.h setmode
> check_func_headers lzo/lzo1x.h lzo1x_999_compress
> check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
> diff --git a/libavcodec/pthread.c b/libavcodec/pthread.c
> index 7e03c64..ebc0514 100644
> --- a/libavcodec/pthread.c
> +++ b/libavcodec/pthread.c
> @@ -30,6 +30,11 @@
> */
>
> #include "config.h"
> +
> +#if HAVE_SYSCONF
> +#include <unistd.h> /* for sysconf and _SC_NPROCESSORS_ONLN */
> +#endif
> +
> #include "avcodec.h"
> #include "internal.h"
> #include "thread.h"
> @@ -919,6 +924,13 @@ int ff_thread_init(AVCodecContext *avctx)
> w32thread_init();
> #endif
>
> + if (!avctx->thread_count) {
> +#if HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN)
> + avctx->thread_count = sysconf(_SC_NPROCESSORS_ONLN);
> +#endif
> + av_log(avctx, AV_LOG_DEBUG, "using %d threads\n",
> avctx->thread_count);
> + }
>
Missing #else fallback? (Can simply default to 1.)
Ronald
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