src/comm/Loops.h

   1 #ifndef _SQUID_SRC_COMM_LOOPS_H
   2 #define _SQUID_SRC_COMM_LOOPS_H
   3
   4 #include "comm/Flag.h"
   5
   6 // for PF
   7 #include "typedefs.h"
   8
   9 /* Comm layer select loops API.
  10  *
  11  * These API functions must be implemented by all FD IO loops used by Squid.
  12  * Defines are provided short-term for legacy code. These will disappear soon.
  13  */
  14
  15 namespace Comm
  16 {
  17
  18 /// Initialize the module on Squid startup
  19 void SelectLoopInit(void);
  20
  21 /// Mark an FD to be watched for its IO status.
  22 void SetSelect(int, unsigned int, PF *, void *, time_t);
  23
  24 /// reset/undo/unregister the watch for an FD which was set by Comm::SetSelect()
  25 void ResetSelect(int);
  26
  27 /** Perform a select() or equivalent call.
  28  * This is used by the main select loop engine to check for FD with IO available.
  29  */
  30 Comm::Flag DoSelect(int);
  31
  32 void QuickPollRequired(void);
  33
  34 /**
  35  * Max number of UDP messages to receive per call to the UDP receive poller.
  36  * This is a per-port limit for ICP/HTCP ports.
  37  * DNS has a separate limit.
  38  */
  39 #if _SQUID_WINDOWS_
  40 #define INCOMING_UDP_MAX 1
  41 #else
  42 #define INCOMING_UDP_MAX 15
  43 #endif
  44
  45 /**
  46  * Max number of DNS messages to receive per call to DNS read handler
  47  */
  48 #if _SQUID_WINDOWS_
  49 #define INCOMING_DNS_MAX 1
  50 #else
  51 #define INCOMING_DNS_MAX 15
  52 #endif
  53
  54 /**
  55  * Max number of new TCP connections to accept per call to the TCP listener poller.
  56  * This is a per-port limit for HTTP/HTTPS ports.
  57  */
  58 #if _SQUID_WINDOWS_
  59 #define INCOMING_TCP_MAX 1
  60 #else
  61 #define INCOMING_TCP_MAX 10
  62 #endif
  63 #define INCOMING_TOTAL_MAX (INCOMING_TCP_MAX+INCOMING_UDP_MAX+INCOMING_DNS_MAX)
  64
  65 } // namespace Comm
  66
  67 #endif /* _SQUID_SRC_COMM_LOOPS_H */