picom/src/log.c

368 lines
8.8 KiB
C
Raw Normal View History

#include <assert.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/uio.h>
#include <time.h>
#include <unistd.h>
#ifdef CONFIG_OPENGL
#include <GL/gl.h>
#include "backend/gl/glx.h"
#include "backend/gl/gl_common.h"
#endif
#include "compiler.h"
#include "log.h"
#include "utils.h"
thread_local struct log *tls_logger;
struct log_target;
struct log {
struct log_target *head;
int log_level;
};
struct log_target {
const struct log_ops *ops;
struct log_target *next;
};
struct log_ops {
void (*write)(struct log_target *, const char *, size_t);
void (*writev)(struct log_target *, const struct iovec *, int vcnt);
void (*destroy)(struct log_target *);
/// Additional strings to print around the log_level string
const char *(*colorize_begin)(enum log_level);
const char *(*colorize_end)(enum log_level);
};
/// Fallback writev for targets don't implement it
static attr_unused void
log_default_writev(struct log_target *tgt, const struct iovec *vec, int vcnt) {
size_t total = 0;
for (int i = 0; i < vcnt; i++) {
total += vec[i].iov_len;
}
if (!total) {
// Nothing to write
return;
}
char *buf = ccalloc(total, char);
total = 0;
for (int i = 0; i < vcnt; i++) {
memcpy(buf + total, vec[i].iov_base, vec[i].iov_len);
total += vec[i].iov_len;
}
tgt->ops->write(tgt, buf, total);
free(buf);
}
static attr_const const char *log_level_to_string(enum log_level level) {
switch (level) {
case LOG_LEVEL_TRACE: return "TRACE";
case LOG_LEVEL_DEBUG: return "DEBUG";
case LOG_LEVEL_INFO: return "INFO";
case LOG_LEVEL_WARN: return "WARN";
case LOG_LEVEL_ERROR: return "ERROR";
case LOG_LEVEL_FATAL: return "FATAL ERROR";
default: return "????";
}
}
enum log_level string_to_log_level(const char *str) {
if (strcasecmp(str, "TRACE") == 0)
return LOG_LEVEL_TRACE;
else if (strcasecmp(str, "DEBUG") == 0)
return LOG_LEVEL_DEBUG;
else if (strcasecmp(str, "INFO") == 0)
return LOG_LEVEL_INFO;
else if (strcasecmp(str, "WARN") == 0)
return LOG_LEVEL_WARN;
else if (strcasecmp(str, "ERROR") == 0)
return LOG_LEVEL_ERROR;
return LOG_LEVEL_INVALID;
}
struct log *log_new(void) {
auto ret = cmalloc(struct log);
ret->log_level = LOG_LEVEL_WARN;
ret->head = NULL;
return ret;
}
void log_add_target(struct log *l, struct log_target *tgt) {
assert(tgt->ops->writev);
tgt->next = l->head;
l->head = tgt;
}
/// Remove a previously added log target for a log struct, and destroy it. If the log
/// target was never added, nothing happens.
void log_remove_target(struct log *l, struct log_target *tgt) {
struct log_target *now = l->head, **prev = &l->head;
while (now) {
if (now == tgt) {
*prev = now->next;
tgt->ops->destroy(tgt);
break;
}
prev = &now->next;
now = now->next;
}
}
/// Destroy a log struct and every log target added to it
void log_destroy(struct log *l) {
// free all tgt
struct log_target *head = l->head;
while (head) {
auto next = head->next;
head->ops->destroy(head);
head = next;
}
free(l);
}
void log_set_level(struct log *l, int level) {
assert(level <= LOG_LEVEL_FATAL && level >= 0);
l->log_level = level;
}
enum log_level log_get_level(const struct log *l) {
return l->log_level;
}
attr_printf(4, 5) void log_printf(struct log *l, int level, const char *func,
const char *fmt, ...) {
assert(level <= LOG_LEVEL_FATAL && level >= 0);
if (level < l->log_level)
return;
char *buf = NULL;
va_list args;
va_start(args, fmt);
size_t blen = vasprintf(&buf, fmt, args);
va_end(args);
if (!buf)
return;
struct timespec ts;
timespec_get(&ts, TIME_UTC);
auto tm = localtime(&ts.tv_sec);
char time_buf[100];
strftime(time_buf, sizeof time_buf, "%x %T", tm);
char *time = NULL;
size_t tlen = asprintf(&time, "%s.%03ld", time_buf, ts.tv_nsec / 1000000);
if (!time) {
free(buf);
return;
}
const char *log_level_str = log_level_to_string(level);
size_t llen = strlen(log_level_str);
size_t flen = strlen(func);
struct log_target *head = l->head;
while (head) {
const char *p = "", *s = "";
size_t plen = 0, slen = 0;
if (head->ops->colorize_begin) {
// construct target specific prefix
p = head->ops->colorize_begin(level);
plen = strlen(p);
if (head->ops->colorize_end) {
s = head->ops->colorize_end(level);
slen = strlen(s);
}
}
head->ops->writev(
head,
(struct iovec[]){{.iov_base = "[ ", .iov_len = 2},
{.iov_base = time, .iov_len = tlen},
{.iov_base = " ", .iov_len = 1},
{.iov_base = (void *)func, .iov_len = flen},
{.iov_base = " ", .iov_len = 1},
{.iov_base = (void *)p, .iov_len = plen},
{.iov_base = (void *)log_level_str, .iov_len = llen},
{.iov_base = (void *)s, .iov_len = slen},
{.iov_base = " ] ", .iov_len = 3},
{.iov_base = buf, .iov_len = blen},
{.iov_base = "\n", .iov_len = 1}},
11);
head = head->next;
}
free(time);
free(buf);
}
/// A trivial deinitializer that simply frees the memory
static attr_unused void logger_trivial_destroy(struct log_target *tgt) {
free(tgt);
}
/// A null log target that does nothing
static const struct log_ops null_logger_ops;
static struct log_target null_logger_target = {
.ops = &null_logger_ops,
};
struct log_target *null_logger_new(void) {
return &null_logger_target;
}
static void null_logger_write(struct log_target *attr_unused tgt,
const char *attr_unused str, size_t attr_unused len) {
return;
}
static void null_logger_writev(struct log_target *attr_unused tgt,
const struct iovec *attr_unused vec, int attr_unused vcnt) {
return;
}
static const struct log_ops null_logger_ops = {
.write = null_logger_write,
.writev = null_logger_writev,
};
/// A file based logger that writes to file (or stdout/stderr)
struct file_logger {
struct log_target tgt;
FILE *f;
struct log_ops ops;
};
void file_logger_write(struct log_target *tgt, const char *str, size_t len) {
auto f = (struct file_logger *)tgt;
fwrite(str, 1, len, f->f);
}
void file_logger_writev(struct log_target *tgt, const struct iovec *vec, int vcnt) {
auto f = (struct file_logger *)tgt;
fflush(f->f);
writev(fileno(f->f), vec, vcnt);
}
void file_logger_destroy(struct log_target *tgt) {
auto f = (struct file_logger *)tgt;
fclose(f->f);
free(tgt);
}
#define ANSI(x) "\033[" x "m"
const char *terminal_colorize_begin(enum log_level level) {
switch (level) {
case LOG_LEVEL_TRACE: return ANSI("30;2");
case LOG_LEVEL_DEBUG: return ANSI("37;2");
case LOG_LEVEL_INFO: return ANSI("92");
case LOG_LEVEL_WARN: return ANSI("33");
case LOG_LEVEL_ERROR: return ANSI("31;1");
case LOG_LEVEL_FATAL: return ANSI("30;103;1");
default: return "";
}
}
const char *terminal_colorize_end(enum log_level level) {
return ANSI("0");
}
#undef PREFIX
static const struct log_ops file_logger_ops = {
.write = file_logger_write,
.writev = file_logger_writev,
.destroy = file_logger_destroy,
};
struct log_target *file_logger_new(const char *filename) {
FILE *f = fopen(filename, "a");
if (!f) {
return NULL;
}
auto ret = cmalloc(struct file_logger);
ret->tgt.ops = &ret->ops;
ret->f = f;
// Always assume a file is not a terminal
ret->ops = file_logger_ops;
return &ret->tgt;
}
struct log_target *stderr_logger_new(void) {
int fd = dup(STDERR_FILENO);
if (fd < 0) {
return NULL;
}
FILE *f = fdopen(fd, "w");
if (!f) {
return NULL;
}
auto ret = cmalloc(struct file_logger);
ret->tgt.ops = &ret->ops;
ret->f = f;
ret->ops = file_logger_ops;
if (isatty(fd)) {
ret->ops.colorize_begin = terminal_colorize_begin;
ret->ops.colorize_end = terminal_colorize_end;
}
return &ret->tgt;
}
#ifdef CONFIG_OPENGL
/// An opengl logger that can be used for logging into opengl debugging tools,
/// such as apitrace
struct gl_string_marker_logger {
struct log_target tgt;
void (*gl_string_marker)(GLsizei len, const char *);
};
void gl_string_marker_logger_write(struct log_target *tgt, const char *str, size_t len) {
auto g = (struct gl_string_marker_logger *)tgt;
g->gl_string_marker(len, str);
}
static const struct log_ops gl_string_marker_logger_ops = {
.write = gl_string_marker_logger_write,
.writev = log_default_writev,
.destroy = logger_trivial_destroy,
};
struct log_target *gl_string_marker_logger_new(void) {
if (!gl_has_extension("GL_GREMEDY_string_marker")) {
return NULL;
}
void *fnptr = glXGetProcAddress((GLubyte *)"glStringMarkerGREMEDY");
if (!fnptr)
return NULL;
auto ret = cmalloc(struct gl_string_marker_logger);
ret->tgt.ops = &gl_string_marker_logger_ops;
ret->gl_string_marker = fnptr;
return &ret->tgt;
}
#else
struct log_target *gl_string_marker_logger_new(void) {
return NULL;
}
#endif
// vim: set noet sw=8 ts=8: