Ruby » Backport200

Backport #8174

Updated by nobu (Nobuyoshi Nakada) about 11 years ago

=begin 
 rb_hook_list_struct defines a member "events": 

   

 typedef struct rb_hook_list_struct { 
       
     struct rb_event_hook_struct *hooks; 
       
     rb_event_flag_t events; 
       
     int need_clean; 
   
 } rb_hook_list_t; 

 AIX defines a macro "events" in sys/poll.h: 

   

 struct    pollfd 
   
 { 
           
         long      fd;                       /* file descriptor or file ptr    */ 
           
         ushort    reqevents;                /* requested events               */ 
           
         ushort    rtnevents;                /* returned events                */ 
   
 }; 
   
 #define events    reqevents                 /* SVR3,4 pollfd member name      */ 
   
 #define revents rtnevents                 /* SVR3,4 pollfd member name      */ 

 Ruby thread.c includes sys/poll.c via ruby/io.h.    This renames the structure member when referenced through EXEC_EVENT_HOOK, e.g., 

         if ((state = EXEC_TAG()) == 0) { 
             SAVE_ROOT_JMPBUF(th, { 
                 if (!th->first_func) { 
                     GetProcPtr(th->first_proc, proc); 
                     th->errinfo = Qnil; 
                     th->root_lep = rb_vm_ep_local_ep(proc->block.ep); 
                     th->root_svar = Qnil; 
                     EXEC_EVENT_HOOK(th, RUBY_EVENT_THREAD_BEGIN, th->self, 0, 0, Qundef); 
                     th->value = rb_vm_invoke_proc(th, proc, (int)RARRAY_LEN(args), RARRAY_PTR(args), 0); 
                     EXEC_EVENT_HOOK(th, RUBY_EVENT_THREAD_END, th->self, 0, 0, Qundef); 
                 } 

 This makes the compiler unhappy: 

   

 compiling /usr/gnu/src/ruby-2.0.0-p0/thread.c 
   
 /usr/gnu/src/ruby-2.0.0-p0/thread.c: In function 'thread_start_func_2': 
   
 /usr/gnu/src/ruby-2.0.0-p0/thread.c:496:6: error: 'rb_hook_list_t' has no member named 'reqevents' 
   
 /usr/gnu/src/ruby-2.0.0-p0/thread.c:496:6: error: 'rb_hook_list_t' has no member named 'reqevents' 
   
 /usr/gnu/src/ruby-2.0.0-p0/thread.c:496:6: error: 'rb_hook_list_t' has no member named 'reqevents' 
   
 /usr/gnu/src/ruby-2.0.0-p0/thread.c:496:6: error: 'rb_hook_list_t' has no member named 'reqevents' 
   
 /usr/gnu/src/ruby-2.0.0-p0/thread.c: In function 'rb_threadptr_execute_interrupts': 
   
 /usr/gnu/src/ruby-2.0.0-p0/thread.c:1917:6: error: 'rb_hook_list_t' has no member named 'reqevents' 
   
 /usr/gnu/src/ruby-2.0.0-p0/thread.c:1917:6: error: 'rb_hook_list_t' has no member named 'reqevents' 

 Because Ruby only uses fd member revents, one option is to change include/ruby/io.h 

   # diff 
    

  #include "ruby/config.h" 
    
  #if defined(HAVE_POLL) 
    
  #    include <poll.h> 
   
 +#    undef events 
    
  #    define RB_WAITFD_IN    POLLIN 
    
  #    define RB_WAITFD_PRI POLLPRI 
    
  #    define RB_WAITFD_OUT POLLOUT 
 =end 

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