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/*
* Copyright (c) 2015 EfficiOS Inc. and Linux Foundation
* Copyright (c) 2015-2020 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <assert.h>
#include <time.h>
#include "barectf-platform-linux-fs.h"
#include "barectf.h"
#ifdef __cplusplus
# define _FROM_VOID_PTR(_type, _value) static_cast<_type *>(_value)
#else
# define _FROM_VOID_PTR(_type, _value) ((_type *) (_value))
#endif
struct barectf_platform_linux_fs_ctx {
struct barectf_default_ctx ctx;
FILE *fh;
int simulate_full_backend;
unsigned int full_backend_rand_lt;
unsigned int full_backend_rand_max;
};
static uint64_t get_clock(void * const data)
{
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
}
static void write_packet(const struct barectf_platform_linux_fs_ctx * const platform_ctx)
{
const size_t nmemb = fwrite(barectf_packet_buf(&platform_ctx->ctx),
barectf_packet_buf_size(&platform_ctx->ctx), 1, platform_ctx->fh);
assert(nmemb == 1);
}
static int is_backend_full(void * const data)
{
int is_backend_full = 0;
const struct barectf_platform_linux_fs_ctx * const platform_ctx =
_FROM_VOID_PTR(const struct barectf_platform_linux_fs_ctx, data);
if (platform_ctx->simulate_full_backend) {
if (rand() % platform_ctx->full_backend_rand_max <
platform_ctx->full_backend_rand_lt) {
is_backend_full = 1;
goto end;
}
}
end:
return is_backend_full;
}
static void open_packet(void * const data)
{
struct barectf_platform_linux_fs_ctx * const platform_ctx =
_FROM_VOID_PTR(struct barectf_platform_linux_fs_ctx, data);
barectf_default_open_packet(&platform_ctx->ctx);
}
static void close_packet(void * const data)
{
struct barectf_platform_linux_fs_ctx * const platform_ctx =
_FROM_VOID_PTR(struct barectf_platform_linux_fs_ctx, data);
/* Close packet now */
barectf_default_close_packet(&platform_ctx->ctx);
/* Write packet to file */
write_packet(platform_ctx);
}
struct barectf_platform_linux_fs_ctx *barectf_platform_linux_fs_init(
const unsigned int buf_size, const char * const data_stream_file_path,
const int simulate_full_backend,
const unsigned int full_backend_rand_lt,
const unsigned int full_backend_rand_max)
{
uint8_t *buf = NULL;
struct barectf_platform_linux_fs_ctx *platform_ctx;
struct barectf_platform_callbacks cbs;
cbs.default_clock_get_value = get_clock;
cbs.is_backend_full = is_backend_full;
cbs.open_packet = open_packet;
cbs.close_packet = close_packet;
platform_ctx = _FROM_VOID_PTR(struct barectf_platform_linux_fs_ctx,
malloc(sizeof(*platform_ctx)));
if (!platform_ctx) {
goto error;
}
buf = _FROM_VOID_PTR(uint8_t, malloc(buf_size));
if (!buf) {
goto error;
}
platform_ctx->fh = fopen(data_stream_file_path, "wb");
if (!platform_ctx->fh) {
goto error;
}
platform_ctx->simulate_full_backend = simulate_full_backend;
platform_ctx->full_backend_rand_lt = full_backend_rand_lt;
platform_ctx->full_backend_rand_max = full_backend_rand_max;
barectf_init(&platform_ctx->ctx, buf, buf_size, cbs, platform_ctx);
open_packet(platform_ctx);
goto end;
error:
free(platform_ctx);
free(buf);
end:
return platform_ctx;
}
void barectf_platform_linux_fs_fini(struct barectf_platform_linux_fs_ctx * const platform_ctx)
{
if (barectf_packet_is_open(&platform_ctx->ctx) &&
!barectf_packet_is_empty(&platform_ctx->ctx)) {
close_packet(platform_ctx);
}
fclose(platform_ctx->fh);
free(barectf_packet_buf(&platform_ctx->ctx));
free(platform_ctx);
}
struct barectf_default_ctx *barectf_platform_linux_fs_get_barectf_ctx(
struct barectf_platform_linux_fs_ctx * const platform_ctx)
{
return &platform_ctx->ctx;
}
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