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android sink - add retry mechanism

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- in some cases subsequent calls to __android_log_write() may result with -EAGAIN error code.
  in such cases spdlog will sleep and try again for number of times defined by
  SPDLOG_ANDROID_LOG_NUM_OF_RETRIES

- defeult SPDLOG_ANDROID_LOG_NUM_OF_RETRIES set to 2 - can be overridden at build time
This commit is contained in:
Alexander Zilberkant 2017-04-30 23:23:17 +03:00
parent 4a25802312
commit 2f205a6dbc
1 changed files with 16 additions and 3 deletions
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19
include/spdlog/sinks/android_sink.h
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@ -12,6 +12,12 @@
#include <mutex>
#include <string>
#include <android/log.h>
#include <thread>
#include <chrono>
#if !defined(SPDLOG_ANDROID_LOG_NUM_OF_RETRIES)
define SPDLOG_ANDROID_LOG_NUM_OF_RETRIES 2
#endif
namespace spdlog
{
@ -31,10 +37,17 @@ public:
{
const android_LogPriority priority = convert_to_android(msg.level);
const char *msg_output = (_use_raw_msg ? msg.raw.c_str() : msg.formatted.c_str());
// See system/core/liblog/logger_write.c for explanation of return value
const int ret = __android_log_write(
priority, _tag.c_str(), msg_output
);
int ret = __android_log_write(priority, _tag.c_str(), msg_output);
int retry_count = 1;
while ((ret == -11/*EAGAIN*/) && (retry_count < SPDLOG_ANDROID_LOG_NUM_OF_RETRIES))
{
std::this_thread::sleep_for(std::chrono::milliseconds(5));
ret = __android_log_write(priority, _tag.c_str(), msg_output);
retry_count++;
}
if (ret < 0)
{
throw spdlog_ex("__android_log_write() failed", ret);