OBJS = src/haproxy.o src/sessionhash.o src/base64.o src/protocols.o \
src/uri_auth.o src/standard.o src/buffers.o src/log.o src/task.o \
- src/time.o src/fd.o src/regex.o src/cfgparse.o src/server.o \
+ src/time.o src/fd.o src/pipe.o src/regex.o src/cfgparse.o src/server.o \
src/checks.o src/queue.o src/client.o src/proxy.o src/proto_uxst.o \
src/proto_http.o src/stream_sock.o src/appsession.o src/backend.o \
src/stream_interface.o src/dumpstats.o src/proto_tcp.o \
OBJS = src/haproxy.o src/sessionhash.o src/base64.o src/protocols.o \
src/uri_auth.o src/standard.o src/buffers.o src/log.o src/task.o \
- src/time.o src/fd.o src/regex.o src/cfgparse.o src/server.o \
+ src/time.o src/fd.o src/pipe.o src/regex.o src/cfgparse.o src/server.o \
src/checks.o src/queue.o src/client.o src/proxy.o src/proto_uxst.o \
src/proto_http.o src/stream_sock.o src/appsession.o src/backend.o \
src/stream_interface.o src/dumpstats.o src/proto_tcp.o \
OBJS = src/haproxy.o src/sessionhash.o src/base64.o src/protocols.o \
src/uri_auth.o src/standard.o src/buffers.o src/log.o src/task.o \
- src/time.o src/fd.o src/regex.o src/cfgparse.o src/server.o \
+ src/time.o src/fd.o src/pipe.o src/regex.o src/cfgparse.o src/server.o \
src/checks.o src/queue.o src/client.o src/proxy.o src/proto_uxst.o \
src/proto_http.o src/stream_sock.o src/appsession.o src/backend.o \
src/stream_interface.o src/dumpstats.o src/proto_tcp.o \
--- /dev/null
+/*
+ include/proto/pipe.h
+ Pipe management
+
+ Copyright (C) 2000-2009 Willy Tarreau - w@1wt.eu
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation, version 2.1
+ exclusively.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#ifndef _PROTO_PIPE_H
+#define _PROTO_PIPE_H
+
+#include <common/config.h>
+#include <types/pipe.h>
+
+extern int pipes_used; /* # of pipes in use (2 fds each) */
+extern int pipes_free; /* # of pipes unused (2 fds each) */
+
+/* return a pre-allocated empty pipe. Try to allocate one if there isn't any
+ * left. NULL is returned if a pipe could not be allocated.
+ */
+struct pipe *get_pipe();
+
+/* destroy a pipe, possibly because an error was encountered on it. Its FDs
+ * will be closed and it will not be reinjected into the live pool.
+ */
+void kill_pipe(struct pipe *p);
+
+/* put back a unused pipe into the live pool. If it still has data in it, it is
+ * closed and not reinjected into the live pool. The caller is not allowed to
+ * use it once released.
+ */
+void put_pipe(struct pipe *p);
+
+#endif /* _PROTO_PIPE_H */
+
+/*
+ * Local variables:
+ * c-indent-level: 8
+ * c-basic-offset: 8
+ * End:
+ */
--- /dev/null
+/*
+ include/types/pipe.h
+ Pipe management.
+
+ Copyright (C) 2000-2009 Willy Tarreau - w@1wt.eu
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation, version 2.1
+ exclusively.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#ifndef _TYPES_PIPE_H
+#define _TYPES_PIPE_H
+
+#include <common/config.h>
+
+/* A pipe is described by its read and write FDs, and the data remaining in it.
+ * The FDs are valid if there are data pending. The user is not allowed to
+ * change the FDs.
+ */
+struct pipe {
+ int data; /* number of bytes present in the pipe */
+ int prod; /* FD the producer must write to ; -1 if none */
+ int cons; /* FD the consumer must read from ; -1 if none */
+ struct pipe *next;
+};
+
+#endif /* _TYPES_PIPE_H */
+
+/*
+ * Local variables:
+ * c-indent-level: 8
+ * c-basic-offset: 8
+ * End:
+ */
--- /dev/null
+/*
+ * Pipe management
+ *
+ * Copyright 2000-2009 Willy Tarreau <w@1wt.eu>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <unistd.h>
+
+#include <common/config.h>
+#include <common/memory.h>
+
+#include <types/global.h>
+#include <types/pipe.h>
+
+struct pool_head *pool2_pipe = NULL;
+struct pipe *pipes_live = NULL; /* pipes which are still ready to use */
+int pipes_used = 0; /* # of pipes in use (2 fds each) */
+int pipes_free = 0; /* # of pipes unused */
+
+/* allocate memory for the pipes */
+static void init_pipe()
+{
+ pool2_pipe = create_pool("pipe", sizeof(struct pipe), MEM_F_SHARED);
+ pipes_used = 0;
+ pipes_free = 0;
+}
+
+/* return a pre-allocated empty pipe. Try to allocate one if there isn't any
+ * left. NULL is returned if a pipe could not be allocated.
+ */
+struct pipe *get_pipe()
+{
+ struct pipe *ret;
+ int pipefd[2];
+
+ if (likely(pipes_live)) {
+ ret = pipes_live;
+ pipes_live = pipes_live->next;
+ pipes_free--;
+ pipes_used++;
+ return ret;
+ }
+
+ if (pipes_used >= global.maxpipes)
+ return NULL;
+
+ ret = pool_alloc2(pool2_pipe);
+ if (!ret)
+ return NULL;
+
+ if (pipe(pipefd) < 0) {
+ pool_free2(pool2_pipe, ret);
+ return NULL;
+ }
+ ret->data = 0;
+ ret->prod = pipefd[1];
+ ret->cons = pipefd[0];
+ ret->next = NULL;
+ pipes_used++;
+ return ret;
+}
+
+/* destroy a pipe, possibly because an error was encountered on it. Its FDs
+ * will be closed and it will not be reinjected into the live pool.
+ */
+void kill_pipe(struct pipe *p)
+{
+ close(p->prod);
+ close(p->cons);
+ pool_free2(pool2_pipe, p);
+ pipes_used--;
+ return;
+}
+
+/* put back a unused pipe into the live pool. If it still has data in it, it is
+ * closed and not reinjected into the live pool. The caller is not allowed to
+ * use it once released.
+ */
+void put_pipe(struct pipe *p)
+{
+ if (p->data) {
+ kill_pipe(p);
+ return;
+ }
+ p->next = pipes_live;
+ pipes_live = p;
+ pipes_free++;
+ pipes_used--;
+}
+
+
+__attribute__((constructor))
+static void __pipe_module_init(void)
+{
+ init_pipe();
+}
+
+/*
+ * Local variables:
+ * c-indent-level: 8
+ * c-basic-offset: 8
+ * End:
+ */
projects / thirdparty / haproxy.git / commitdiff
