Commit e4a6ea5c authored by Nick Mathewson's avatar Nick Mathewson 🦀
Browse files

Add abstraction for fork vs thread. 


svn:r387
parent 5c425559

src/common/util.c

+40 −0
Original line number Diff line number Diff line
@@ -18,6 +18,13 @@ 
#ifdef HAVE_FCNTL_H

#include <fcntl.h>

#endif

#ifdef HAVE_SYS_TYPES_H

#include <sys/types.h>

#endif

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#endif

#include <assert.h>



#include "util.h"

#include "log.h"
@@ -107,3 +114,36 @@ void set_socket_nonblocking(int socket) 
	fcntl(socket, F_SETFL, O_NONBLOCK);

#endif

}



int spawn_func(int (*func)(void *), void *data)

{

#ifdef _MSC_VER

  int rv;

  rv = _beginthread(func, 0, data);

  if (rv == (unsigned long) -1)

    return -1;

  return 0;

#else

  pid_t pid;

  pid = fork();

  if (pid<0)

    return -1;

  if (pid==0) {

    /* Child */

    func(data);

    assert(0); /* Should never reach here. */

  } else {

    /* Parent */

    return 0;

  }

#endif

}



void spawn_exit()

{

#ifdef _MSC_VER

  _endthread();

#else

  exit(0);

#endif

}

src/common/util.h

+7 −0
Original line number Diff line number Diff line
@@ -45,4 +45,11 @@ int tv_cmp(struct timeval *a, struct timeval *b); 


void set_socket_nonblocking(int socket);



/* Minimalist interface to run a void function in the background.  On

   unix calls fork, on win32 calls beginthread.  Returns -1 on failure.

   func should not return, but rather should call spawn_exit.

*/

int spawn_func(int (*func)(void *), void *data);

void spawn_exit();



#endif