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Revision 1.3 by root, Mon Nov 5 17:57:53 2007 UTC vs.
Revision 1.11 by root, Thu Nov 8 22:01:02 2007 UTC

1EMBEDDING THE LIBEV CODE INTO YOUR OWN PROGRAMS 1EMBEDDING THE LIBEV CODE INTO YOUR OWN PROGRAMS
2 2
3 Instead of building the libev library you cna also include the code 3 Instead of building the libev library you can also include the code
4 as-is into your programs. To update, you only have to copy a few files 4 as-is into your programs. To update, you only have to copy a few files
5 into your source tree. 5 into your source tree.
6 6
7 This is how it works: 7 This is how it works:
8 8
9FILESETS 9FILESETS
10
11 CORE EVENT LOOP
10 12
11 To include only the libev core (all the ev_* functions): 13 To include only the libev core (all the ev_* functions):
12 14
13 #define EV_STANDALONE 1 15 #define EV_STANDALONE 1
14 #include "ev.c" 16 #include "ev.c"
15 17
16 This will automatically include ev.h, too, and should be done in a 18 This will automatically include ev.h, too, and should be done in a
17 single C source file only to provide the function implementations. To 19 single C source file only to provide the function implementations. To
18 use it, do the same for ev.h in all users: 20 use it, do the same for ev.h in all files wishing to use this API
21 (best done by writing a wrapper around ev.h that you can include
22 instead and where you can put other configuration options):
19 23
20 #define EV_STANDALONE 1 24 #define EV_STANDALONE 1
21 #include "ev.h" 25 #include "ev.h"
26
27 Both header files and implementation files can be compiled with a C++
28 compiler (at least, thats a stated goal, and breakage will be treated
29 as a bug).
22 30
23 You need the following files in your source tree, or in a directory 31 You need the following files in your source tree, or in a directory
24 in your include path (e.g. in libev/ when using -Ilibev): 32 in your include path (e.g. in libev/ when using -Ilibev):
25 33
26 ev.h 34 ev.h
27 ev.c 35 ev.c
28 ev_vars.h 36 ev_vars.h
29 ev_wrap.h 37 ev_wrap.h
38 ev_win32.c
39
30 ev_select.c only when select backend is enabled (which is by default) 40 ev_select.c only when select backend is enabled (which is is by default)
31 ev_poll.c only when poll backend is enabled (disabled by default) 41 ev_poll.c only when poll backend is enabled (disabled by default)
32 ev_epoll.c only when the epoll backend is enabled (disabled by default) 42 ev_epoll.c only when the epoll backend is enabled (disabled by default)
33 ev_kqueue.c only when the kqueue backend is enabled (disabled by default) 43 ev_kqueue.c only when the kqueue backend is enabled (disabled by default)
34 44
35 "ev.c" includes the backend files directly when enabled. 45 "ev.c" includes the backend files directly when enabled.
46
47 LIBEVENT COMPATIBILITY API
36 48
37 To include the libevent compatibility API, also include: 49 To include the libevent compatibility API, also include:
38 50
39 #include "event.c" 51 #include "event.c"
40 52
… …
84 If undefined or defined to be "1", libev will compile in support 96 If undefined or defined to be "1", libev will compile in support
85 for the select(2) backend. No attempt at autodetection will be 97 for the select(2) backend. No attempt at autodetection will be
86 done: if no other method takes over, select will be it. Otherwise 98 done: if no other method takes over, select will be it. Otherwise
87 the select backend will not be compiled in. 99 the select backend will not be compiled in.
88 100
101 EV_SELECT_USE_WIN32_HANDLES
102
103 When defined to 1, the select backend will assume that select
104 doesn't understand file descriptors but wants osf handles on
105 win32 (this is the case when the select to be used is the winsock
106 select). This means that it will call _get_osfhandle on the fd to
107 convert it to an OS handle. Should not be defined on non-win32
108 platforms.
109
89 EV_USE_POLL 110 EV_USE_POLL
90 111
91 If defined to be "1", libev will compile in support for the poll(2) 112 If defined to be "1", libev will compile in support for the poll(2)
92 backend. No attempt at autodetection will be done. poll usually 113 backend. No attempt at autodetection will be done. poll usually
93 performs worse than select, so its not enabled by default (it is 114 performs worse than select, so its not enabled by default (it is
… …
118 139
119 For example, the perl EV module uses this: 140 For example, the perl EV module uses this:
120 141
121 #define EV_COMMON \ 142 #define EV_COMMON \
122 SV *self; /* contains this struct */ \ 143 SV *self; /* contains this struct */ \
123 SV *cb_sv, *fh; 144 SV *cb_sv, *fh /* note no trailing ";" */
124 145
125 EV_PROTOTYPES 146 EV_PROTOTYPES
126 147
127 If defined to be "0", then "ev.h" will not define any function 148 If defined to be "0", then "ev.h" will not define any function
128 prototypes, but still define all the structs and other 149 prototypes, but still define all the structs and other
… …
140EXAMPLES 161EXAMPLES
141 162
142 For a real-world example of a program the includes libev 163 For a real-world example of a program the includes libev
143 verbatim, you can have a look at the EV perl module 164 verbatim, you can have a look at the EV perl module
144 (http://software.schmorp.de/pkg/EV.html). It has the libev files in 165 (http://software.schmorp.de/pkg/EV.html). It has the libev files in
145 the liev/ subdirectory and includes them in the EV/EVAPI.h (public 166 the libev/ subdirectory and includes them in the EV/EVAPI.h (public
146 interface) and EV.xs (implementation) files. Only EV.xs file will be 167 interface) and EV.xs (implementation) files. Only the EV.xs file will
147 compiled. 168 be compiled.
148 169

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