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Handle pipes on platforms where they are non-existant of broken.

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We do this by creating a TCP socket pair instead of a normal pipe. Since
Windows isn't UNIX-y enough to support read()/write() on sockets, we also
need a wrapper to handle read() vs recv() and write() vs send().


git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@840 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Pierre Ossman 2006-05-11 11:08:58 +00:00
parent 12d4b5d952
commit 48d66cd5e8
9 changed files with 249 additions and 107 deletions
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45
src/polypcore/util.c
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@ -198,6 +198,47 @@ finish:
return ret;
}
/** Platform independent read function. Necessary since not all systems
* treat all file descriptors equal. */
ssize_t pa_read(int fd, void *buf, size_t count) {
ssize_t r;
#ifdef OS_IS_WIN32
r = recv(fd, buf, count, 0);
if (r < 0) {
if (WSAGetLastError() != WSAENOTSOCK) {
errno = WSAGetLastError();
return r;
}
}
if (r < 0)
#endif
r = read(fd, buf, count);
return r;
}
/** Similar to pa_read(), but handles writes */
ssize_t pa_write(int fd, void *buf, size_t count) {
ssize_t r;
#ifdef OS_IS_WIN32
r = send(fd, buf, count, 0);
if (r < 0) {
if (WSAGetLastError() != WSAENOTSOCK) {
errno = WSAGetLastError();
return r;
}
}
if (r < 0)
#endif
r = write(fd, buf, count);
return r;
}
/** Calls read() in a loop. Makes sure that as much as 'size' bytes,
* unless EOF is reached or an error occured */
ssize_t pa_loop_read(int fd, void*data, size_t size) {
@ -207,7 +248,7 @@ ssize_t pa_loop_read(int fd, void*data, size_t size) {
while (size > 0) {
ssize_t r;
if ((r = read(fd, data, size)) < 0)
if ((r = pa_read(fd, data, size)) < 0)
return r;
if (r == 0)
@ -229,7 +270,7 @@ ssize_t pa_loop_write(int fd, const void*data, size_t size) {
while (size > 0) {
ssize_t r;
if ((r = write(fd, data, size)) < 0)
if ((r = pa_write(fd, data, size)) < 0)
return r;
if (r == 0)