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Use modern libcurl poll/wait methods
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commit
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@ -47,7 +47,7 @@ option(ENABLE_CURL "Enable cURL support for fetching media" TRUE)
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set(USE_CURL FALSE)
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if(ENABLE_CURL)
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find_package(CURL)
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find_package(CURL 7.28.0)
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if (CURL_FOUND)
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message(STATUS "cURL support enabled.")
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set(USE_CURL TRUE)
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@ -25,7 +25,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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#include <unordered_map>
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#include <cerrno>
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#include <mutex>
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#include "network/socket.h" // for select()
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#include "threading/event.h"
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#include "config.h"
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#include "exceptions.h"
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@ -436,6 +435,12 @@ HTTPFetchOngoing::~HTTPFetchOngoing()
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}
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#if LIBCURL_VERSION_NUM >= 0x074200
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#define HAVE_CURL_MULTI_POLL
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#else
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#undef HAVE_CURL_MULTI_POLL
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#endif
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class CurlFetchThread : public Thread
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{
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protected:
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@ -595,63 +600,41 @@ protected:
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// Wait until some IO happens, or timeout elapses
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void waitForIO(long timeout)
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{
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fd_set read_fd_set;
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fd_set write_fd_set;
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fd_set exc_fd_set;
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int max_fd;
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long select_timeout = -1;
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struct timeval select_tv;
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CURLMcode mres;
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FD_ZERO(&read_fd_set);
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FD_ZERO(&write_fd_set);
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FD_ZERO(&exc_fd_set);
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#ifdef HAVE_CURL_MULTI_POLL
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mres = curl_multi_poll(m_multi, nullptr, 0, timeout, nullptr);
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mres = curl_multi_fdset(m_multi, &read_fd_set,
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&write_fd_set, &exc_fd_set, &max_fd);
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if (mres != CURLM_OK) {
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errorstream<<"curl_multi_fdset"
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<<" returned error code "<<mres
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<<std::endl;
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select_timeout = 0;
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errorstream << "curl_multi_poll returned error code "
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<< mres << std::endl;
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}
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mres = curl_multi_timeout(m_multi, &select_timeout);
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if (mres != CURLM_OK) {
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errorstream<<"curl_multi_timeout"
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<<" returned error code "<<mres
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<<std::endl;
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select_timeout = 0;
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}
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// Limit timeout so new requests get through
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if (select_timeout < 0 || select_timeout > timeout)
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select_timeout = timeout;
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if (select_timeout > 0) {
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// in Winsock it is forbidden to pass three empty
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// fd_sets to select(), so in that case use sleep_ms
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if (max_fd != -1) {
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select_tv.tv_sec = select_timeout / 1000;
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select_tv.tv_usec = (select_timeout % 1000) * 1000;
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int retval = select(max_fd + 1, &read_fd_set,
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&write_fd_set, &exc_fd_set,
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&select_tv);
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if (retval == -1) {
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#ifdef _WIN32
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errorstream<<"select returned error code "
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<<WSAGetLastError()<<std::endl;
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#else
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errorstream<<"select returned error code "
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<<errno<<std::endl;
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// If there's nothing to do curl_multi_wait() will immediately return
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// so we have to emulate the sleeping.
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fd_set dummy;
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int max_fd;
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mres = curl_multi_fdset(m_multi, &dummy, &dummy, &dummy, &max_fd);
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if (mres != CURLM_OK) {
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errorstream << "curl_multi_fdset returned error code "
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<< mres << std::endl;
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max_fd = -1;
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}
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if (max_fd == -1) { // curl has nothing to wait for
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if (timeout > 0)
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sleep_ms(timeout);
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} else {
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mres = curl_multi_wait(m_multi, nullptr, 0, timeout, nullptr);
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if (mres != CURLM_OK) {
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errorstream << "curl_multi_wait returned error code "
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<< mres << std::endl;
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}
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}
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#endif
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}
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}
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else {
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sleep_ms(select_timeout);
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}
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}
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}
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void *run()
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{
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