X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=urcu%2Farch%2Fgeneric.h;h=4b56ed7aaff00788a5fb4fbce712a146c5198a5d;hp=1ea7f59ca396d0c13d49372ccb26976bbed2d2d8;hb=a0307b90e502a48cc73ca936bce0792f5566ba64;hpb=bce63dfd0a2306452c9e39f5df01789e77f3f44a diff --git a/urcu/arch/generic.h b/urcu/arch/generic.h index 1ea7f59..4b56ed7 100644 --- a/urcu/arch/generic.h +++ b/urcu/arch/generic.h @@ -23,6 +23,7 @@ #include #include +#include #ifdef __cplusplus extern "C" { @@ -37,9 +38,9 @@ extern "C" { /* * Architectures with cache coherency must _not_ define cmm_mc/cmm_rmc/cmm_wmc. * - * For them, cmm_mc/cmm_rmc/cmm_wmc are implemented with a * simple compiler barrier; - * in addition, we provide defaults for cmm_mb (using GCC builtins) as well as - * cmm_rmb and cmm_wmb (defaulting to cmm_mb). + * For them, cmm_mc/cmm_rmc/cmm_wmc are implemented with a simple + * compiler barrier; in addition, we provide defaults for cmm_mb (using + * GCC builtins) as well as cmm_rmb and cmm_wmb (defaulting to cmm_mb). */ #ifndef cmm_mb @@ -61,14 +62,14 @@ extern "C" { /* * Architectures without cache coherency need something like the following: * - * #define cmm_mc() arch_cache_flush() + * #define cmm_mc() arch_cache_flush() * #define cmm_rmc() arch_cache_flush_read() * #define cmm_wmc() arch_cache_flush_write() * - * Of these, only cmm_mc is mandatory. cmm_rmc and cmm_wmc default to cmm_mc. - * cmm_mb/cmm_rmb/cmm_wmb use these definitions by default: + * Of these, only cmm_mc is mandatory. cmm_rmc and cmm_wmc default to + * cmm_mc. cmm_mb/cmm_rmb/cmm_wmb use these definitions by default: * - * #define cmm_mb() cmm_mc() + * #define cmm_mb() cmm_mc() * #define cmm_rmb() cmm_rmc() * #define cmm_wmb() cmm_wmc() */ @@ -149,6 +150,58 @@ extern "C" { #define caa_cpu_relax() cmm_barrier() #endif +#ifndef HAS_CAA_GET_CYCLES +#define HAS_CAA_GET_CYCLES + +#ifdef CONFIG_RCU_HAVE_CLOCK_GETTIME + +#include +#include + +typedef uint64_t caa_cycles_t; + +static inline caa_cycles_t caa_get_cycles (void) +{ + struct timespec ts; + + if (caa_unlikely(clock_gettime(CLOCK_MONOTONIC, &ts))) + return -1ULL; + return ((uint64_t) ts.tv_sec * 1000000000ULL) + ts.tv_nsec; +} + +#elif defined(__APPLE__) + +#include +#include +#include +#include +#include + +typedef uint64_t caa_cycles_t; + +static inline caa_cycles_t caa_get_cycles (void) +{ + mach_timespec_t ts = { 0, 0 }; + static clock_serv_t clock_service; + + if (caa_unlikely(!clock_service)) { + if (host_get_clock_service(mach_host_self(), + SYSTEM_CLOCK, &clock_service)) + return -1ULL; + } + if (caa_unlikely(clock_get_time(clock_service, &ts))) + return -1ULL; + return ((uint64_t) ts.tv_sec * 1000000000ULL) + ts.tv_nsec; +} + +#else + +#error caa_get_cycles() not implemented for this platform. + +#endif + +#endif /* HAS_CAA_GET_CYCLES */ + #ifdef __cplusplus } #endif