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utils.cc
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utils.cc
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#include <utility>
#include <fcntl.h>
#include <stdlib.h>
#include "utils.h"
namespace rpc {
void* ThreadPool::start_thread_pool(void* args) {
std::pair<ThreadPool*, int>* thread_args = (std::pair<ThreadPool*, int>*) args;
ThreadPool* threadpool = thread_args->first;
int tid = thread_args->second;
delete thread_args;
threadpool->run_thread(tid);
pthread_exit(NULL);
return NULL;
}
ThreadPool::ThreadPool(int n /* =... */)
: n_(n) {
th_ = new pthread_t[n_];
q_ = new Queue<Runnable*> [n_];
for (int i = 0; i < n_; i++) {
std::pair<ThreadPool*, int>* thread_args = new std::pair<ThreadPool*, int>;
thread_args->first = this;
thread_args->second = i;
Pthread_create(&th_[i], NULL, ThreadPool::start_thread_pool, thread_args);
}
}
ThreadPool::~ThreadPool() {
for (int i = 0; i < n_; i++) {
q_[i].push(NULL); // NULL is used as a termination token
}
for (int i = 0; i < n_; i++) {
Pthread_join(th_[i], NULL);
}
delete[] th_;
delete[] q_;
}
void ThreadPool::run_async(Runnable* r) {
verify(r != NULL);
// NULL is used to terminate a thread
// Randomly select a thread for the job.
// There could be better schedule policy.
int queue_id = rand() % n_;
q_[queue_id].push(r);
}
void ThreadPool::run_thread(int tid) {
for (;;) {
Runnable* j = q_[tid].pop();
if (j == NULL) {
return;
}
j->run();
delete j;
}
}
int Log::level = Log::DEBUG;
FILE* Log::fp = stdout;
pthread_mutex_t Log::m = PTHREAD_MUTEX_INITIALIZER;
void Log::set_level(int level) {
Pthread_mutex_lock(&Log::m);
Log::level = level;
Pthread_mutex_unlock(&Log::m);
}
void Log::set_file(FILE* fp) {
verify(fp != NULL);
Pthread_mutex_lock(&Log::m);
Log::fp = fp;
Pthread_mutex_unlock(&Log::m);
}
void Log::log_v(int level, const char* fmt, va_list args) {
static char indicator[] = { 'F', 'E', 'W', 'I', 'D' };
assert(level <= Log::DEBUG);
if (level <= Log::level) {
Pthread_mutex_lock(&Log::m);
fprintf(Log::fp, "%c: ", indicator[level]);
vfprintf(Log::fp, fmt, args);
fprintf(Log::fp, "\n");
fflush(Log::fp);
Pthread_mutex_unlock(&Log::m);
}
}
void Log::log(int level, const char* fmt, ...) {
va_list args;
va_start(args, fmt);
log_v(level, fmt, args);
va_end(args);
}
void Log::fatal(const char* fmt, ...) {
va_list args;
va_start(args, fmt);
log_v(Log::FATAL, fmt, args);
va_end(args);
}
void Log::error(const char* fmt, ...) {
va_list args;
va_start(args, fmt);
log_v(Log::ERROR, fmt, args);
va_end(args);
}
void Log::warn(const char* fmt, ...) {
va_list args;
va_start(args, fmt);
log_v(Log::WARN, fmt, args);
va_end(args);
}
void Log::info(const char* fmt, ...) {
va_list args;
va_start(args, fmt);
log_v(Log::INFO, fmt, args);
va_end(args);
}
void Log::debug(const char* fmt, ...) {
va_list args;
va_start(args, fmt);
log_v(Log::DEBUG, fmt, args);
va_end(args);
}
int set_nonblocking(int fd, bool nonblocking) {
int ret = fcntl(fd, F_GETFL, 0);
if (ret != -1) {
if (nonblocking) {
ret = fcntl(fd, F_SETFL, ret | O_NONBLOCK);
} else {
ret = fcntl(fd, F_SETFL, ret & ~O_NONBLOCK);
}
}
return ret;
}
}