From ef4c9fc8542e06b1d567172c04b0c0377c7ab0c5 Mon Sep 17 00:00:00 2001 From: "Daniel P. Berrange" Date: Tue, 4 Oct 2016 14:35:49 +0100 Subject: trace: remove the TraceEventID and TraceEventVCPUID enums MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The TraceEventID and TraceEventVCPUID enums constants are no longer actually used for anything critical. The TRACE_EVENT_COUNT limit is used to determine the size of the TraceEvents array, and can be removed if we just NULL terminate the array instead. The TRACE_VCPU_EVENT_COUNT limit is used as a magic value for marking non-vCPU events, and also for declaring the size of the trace dstate mask in the CPUState struct. The former usage can be replaced by a dedicated constant TRACE_EVENT_VCPU_NONE, defined as (uint32_t)-1. For the latter usage, we can simply define a constant for the number of VCPUs, avoiding the need for the full enum. The only other usages of the enum values can be replaced by accesing the id/vcpu_id fields via the named TraceEvent structs. Reviewed-by: Lluís Vilanova Reviewed-by: Stefan Hajnoczi Signed-off-by: Daniel P. Berrange Message-id: 1475588159-30598-11-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi --- trace/control.h | 32 +++++++++----------------------- 1 file changed, 9 insertions(+), 23 deletions(-) (limited to 'trace/control.h') diff --git a/trace/control.h b/trace/control.h index 10d4aba78c..cccd2a295e 100644 --- a/trace/control.h +++ b/trace/control.h @@ -18,17 +18,6 @@ typedef struct TraceEventIter { const char *pattern; } TraceEventIter; -/** - * TraceEventID: - * - * Unique tracing event identifier. - * - * These are named as 'TRACE_${EVENT_NAME}'. - * - * See also: "trace/generated-events.h" - */ -enum TraceEventID; - /** * trace_event_iter_init: @@ -76,17 +65,17 @@ static bool trace_event_is_pattern(const char *str); * * Get the identifier of an event. */ -static TraceEventID trace_event_get_id(TraceEvent *ev); +static uint32_t trace_event_get_id(TraceEvent *ev); /** * trace_event_get_vcpu_id: * * Get the per-vCPU identifier of an event. * - * Special value #TRACE_VCPU_EVENT_COUNT means the event is not vCPU-specific + * Special value #TRACE_VCPU_EVENT_NONE means the event is not vCPU-specific * (does not have the "vcpu" property). */ -static TraceEventVCPUID trace_event_get_vcpu_id(TraceEvent *ev); +static uint32_t trace_event_get_vcpu_id(TraceEvent *ev); /** * trace_event_is_vcpu: @@ -104,14 +93,12 @@ static const char * trace_event_get_name(TraceEvent *ev); /** * trace_event_get_state: - * @id: Event identifier. + * @id: Event identifier name. * * Get the tracing state of an event (both static and dynamic). * * If the event has the disabled property, the check will have no performance * impact. - * - * As a down side, you must always use an immediate #TraceEventID value. */ #define trace_event_get_state(id) \ ((id ##_ENABLED) && trace_event_get_state_dynamic_by_id(id)) @@ -119,19 +106,18 @@ static const char * trace_event_get_name(TraceEvent *ev); /** * trace_event_get_vcpu_state: * @vcpu: Target vCPU. - * @id: Event identifier (TraceEventID). - * @vcpu_id: Per-vCPU event identifier (TraceEventVCPUID). + * @id: Event identifier name. * * Get the tracing state of an event (both static and dynamic) for the given * vCPU. * * If the event has the disabled property, the check will have no performance * impact. - * - * As a down side, you must always use an immediate #TraceEventID value. */ -#define trace_event_get_vcpu_state(vcpu, id, vcpu_id) \ - ((id ##_ENABLED) && trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, vcpu_id)) +#define trace_event_get_vcpu_state(vcpu, id) \ + ((id ##_ENABLED) && \ + trace_event_get_vcpu_state_dynamic_by_vcpu_id( \ + vcpu, _ ## id ## _EVENT.vcpu_id)) /** * trace_event_get_state_static: -- cgit v1.2.1