barectf.h.j2: add barectf_discarded_event_records_count()

[barectf.git] / barectf / templates / c / barectf.h.j2

{#
 # The MIT License (MIT)
 #
 # Copyright (c) 2020 Philippe Proulx <pproulx@efficios.com>
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
 # "Software"), to deal in the Software without restriction, including
 # without limitation the rights to use, copy, modify, merge, publish,
 # distribute, sublicense, and/or sell copies of the Software, and to
 # permit persons to whom the Software is furnished to do so, subject to
 # the following conditions:
 #
 # The above copyright notice and this permission notice shall be
 # included in all copies or substantial portions of the Software.
 #
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 # IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 # CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #}
{% import 'common.j2' as common %}
{% import 'c/common.j2' as c_common %}
{% set prefix = common.prefix %}
{% set ucprefix = common.ucprefix %}
{% set trace_type = cfg.trace.type %}
{% set cg_opts = cfg.options.code_generation_options %}
{% set def_dst = cg_opts.default_data_stream_type %}
{% set header_opts = cg_opts.header_options %}
{% set const_params = false %}
#ifndef _{{ ucprefix }}H
#define _{{ ucprefix }}H

{% include 'license-header.j2' %}


#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

{% if header_opts.identifier_prefix_definition %}
/* Backward compatibility */
#define _BARECTF_PREFIX {{ prefix }}

#define _BARECTF_IDENTIFIER_PREFIX {{ prefix }}
{% endif %}
{% if def_dst and header_opts.default_data_stream_type_name_definition %}
/* Backward compatibility */
#define _BARECTF_DEFAULT_STREAM {{ def_dst.name }}

#define _BARECTF_DEFAULT_DATA_STREAM_TYPE_NAME {{ def_dst.name }}
{% endif %}
{% if def_dst %}

	{% for ert in def_dst.event_record_types | sort %}
#define {{ prefix }}trace_{{ ert.name }} {{ c_common.trace_func_name(def_dst, ert) }}
	{% endfor %}
{% endif %}

struct {{ prefix }}ctx;

uint32_t {{ prefix }}packet_size(const void *ctx);
int {{ prefix }}packet_is_full(const void *ctx);
int {{ prefix }}packet_is_empty(const void *ctx);
uint32_t {{ prefix }}packet_events_discarded(const void *ctx);
uint32_t {{ prefix }}discarded_event_records_count(const void * const ctx);
uint8_t *{{ prefix }}packet_buf(const void *ctx);
void {{ prefix }}packet_set_buf(void *ctx, uint8_t *buf, uint32_t buf_size);
uint32_t {{ prefix }}packet_buf_size(const void *ctx);
int {{ prefix }}packet_is_open(const void *ctx);
int {{ prefix }}is_in_tracing_section(const void *ctx);
volatile const int *{{ prefix }}is_in_tracing_section_ptr(const void *ctx);
int {{ prefix }}is_tracing_enabled(const void *ctx);
void {{ prefix }}enable_tracing(void *ctx, int enable);

/* barectf platform callbacks */
struct {{ prefix }}platform_callbacks {
{% set clk_types = trace_type.clock_types %}
{% if clk_types %}
	/* Clock source callbacks */
	{% for clk_type in clk_types | sort %}
	{{ cg_opts.clock_type_c_types[clk_type] }} (*{{ clk_type.name }}_clock_get_value)(void *);
	{% endfor %}

{% endif %}
	/* Is the back end full? */
	int (*is_backend_full)(void *);

	/* Open packet */
	void (*open_packet)(void *);

	/* Close packet */
	void (*close_packet)(void *);
};

/* Common barectf context */
struct {{ prefix }}ctx {
	/* Platform callbacks */
	struct {{ prefix }}platform_callbacks cbs;

	/* Platform data (passed to callbacks) */
	void *data;

	/* Output buffer (will contain a CTF binary packet) */
	uint8_t *buf;

	/* Packet's total size (bits) */
	uint32_t packet_size;

	/* Packet's content size (bits) */
	uint32_t content_size;

	/* Current position from beginning of packet (bits) */
	uint32_t at;

	/* Size of packet header + context fields (content offset) */
	uint32_t off_content;

	/* Discarded event records counter snapshot */
	uint32_t events_discarded;

	/* Current packet is open? */
	int packet_is_open;

	/* In tracing code? */
	volatile int in_tracing_section;

	/* Tracing is enabled? */
	volatile int is_tracing_enabled;

	/* Use current/last event record timestamp when opening/closing packets */
	int use_cur_last_event_ts;
};

{% for dst in trace_type.data_stream_types | sort %}
/* Context for data stream type `{{ dst.name }}` */
struct {{ prefix }}{{ dst.name }}_ctx {
	/* Parent */
	struct {{ prefix }}ctx parent;

	/* Config-specific members follow */
	{% if trace_type._pkt_header_ft %}
		{% for member_name in trace_type._pkt_header_ft.members %}
	uint32_t off_ph_{{ member_name }};
		{% endfor %}
	{% endif %}
	{% for member_name in dst._pkt_ctx_ft.members %}
	uint32_t off_pc_{{ member_name }};
	{% endfor %}
	{% if dst.default_clock_type %}
	{{ cg_opts.clock_type_c_types[dst.default_clock_type] }} cur_last_event_ts;
	{% endif %}
};

{% endfor %}
{% include 'c/ctx-init-func-proto.j2' %};

{% for dst in trace_type.data_stream_types | sort %}
	{% include 'c/open-func-proto.j2' %};

	{% include 'c/close-func-proto.j2' %};
	{% for ert in dst.event_record_types | sort %}

		{% include 'c/trace-func-proto.j2' %};
	{% endfor %}
{% endfor %}

#ifdef __cplusplus
}
#endif

#endif /* _{{ ucprefix }}H */