diff --git a/include/cutils/abort_socket.h b/include/cutils/abort_socket.h
new file mode 100644
index 0000000..fbb1112
--- /dev/null
+++ b/include/cutils/abort_socket.h
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2009, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* Helper to perform abortable blocking operations on a socket:
+ *   asocket_connect()
+ *   asocket_accept()
+ *   asocket_read()
+ *   asocket_write()
+ * These calls are similar to the regular syscalls, but can be aborted with:
+ *   asocket_abort()
+ *
+ * Calling close() on a regular POSIX socket does not abort blocked syscalls on
+ * that socket in other threads.
+ *
+ * After calling asocket_abort() the socket cannot be reused.
+ *
+ * Call asocket_destory() *after* all threads have finished with the socket to
+ * finish closing the socket and free the asocket structure.
+ *
+ * The helper is implemented by setting the socket non-blocking to initiate
+ * syscalls connect(), accept(), read(), write(), then using a blocking poll()
+ * on both the primary socket and a local pipe. This makes the poll() abortable
+ * by writing a byte to the local pipe in asocket_abort().
+ *
+ * asocket_create() sets the fd to non-blocking mode. It must not be changed to
+ * blocking mode.
+ *
+ * Using asocket will triple the number of file descriptors required per
+ * socket, due to the local pipe. It may be possible to use a global pipe per
+ * process rather than per socket, but we have not been able to come up with a
+ * race-free implementation yet.
+ *
+ * All functions except asocket_init() and asocket_destroy() are thread safe.
+ */
+
+#include <stdlib.h>
+#include <sys/socket.h>
+
+#ifndef __CUTILS_ABORT_SOCKET_H__
+#define __CUTILS_ABORT_SOCKET_H__
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct asocket {
+    int fd;           /* primary socket fd */
+    int abort_fd[2];  /* pipe used to abort */
+};
+
+/* Create an asocket from fd.
+ * Sets the socket to non-blocking mode.
+ * Returns NULL on error with errno set.
+ */
+struct asocket *asocket_init(int fd);
+
+/* Blocking socket I/O with timeout.
+ * Calling asocket_abort() from another thread will cause each of these
+ * functions to immediately return with value -1 and errno ECANCELED.
+ * timeout is in ms, use -1 to indicate no timeout. On timeout -1 is returned
+ * with errno ETIMEDOUT.
+ * EINTR is handled in-call.
+ * Other semantics are identical to the regular syscalls.
+ */
+int asocket_connect(struct asocket *s, const struct sockaddr *addr,
+        socklen_t addrlen, int timeout);
+
+int asocket_accept(struct asocket *s, struct sockaddr *addr,
+        socklen_t *addrlen, int timeout);
+
+int asocket_read(struct asocket *s, void *buf, size_t count, int timeout);
+
+int asocket_write(struct asocket *s, const void *buf, size_t count,
+        int timeout);
+
+/* Abort above calls and shutdown socket.
+ * Further I/O operations on this socket will immediately fail after this call.
+ * asocket_destroy() should be used to release resources once all threads
+ * have returned from blocking calls on the socket.
+ */
+void asocket_abort(struct asocket *s);
+
+/* Close socket and free asocket structure.
+ * Must not be called until all calls on this structure have completed.
+ */
+void asocket_destroy(struct asocket *s);
+
+#ifdef __cplusplus
+}
+#endif
+#endif //__CUTILS_ABORT_SOCKET__H__
diff --git a/libcutils/Android.mk b/libcutils/Android.mk
index c9b0ebe..7cb1ae4 100644
--- a/libcutils/Android.mk
+++ b/libcutils/Android.mk
@@ -17,6 +17,7 @@
 include $(CLEAR_VARS)
 
 commonSources := \
+	abort_socket.c \
 	array.c \
 	hashmap.c \
 	atomic.c \
diff --git a/libcutils/abort_socket.c b/libcutils/abort_socket.c
new file mode 100644
index 0000000..d732142
--- /dev/null
+++ b/libcutils/abort_socket.c
@@ -0,0 +1,293 @@
+/*
+ * Copyright 2009, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <sys/poll.h>
+
+#include "cutils/abort_socket.h"
+
+struct asocket *asocket_init(int fd) {
+    int abort_fd[2];
+    int flags;
+    struct asocket *s;
+
+    /* set primary socket to non-blocking */
+    flags = fcntl(fd, F_GETFL);
+    if (flags == -1)
+        return NULL;
+    if (fcntl(fd, F_SETFL, flags | O_NONBLOCK))
+        return NULL;
+
+    /* create pipe with non-blocking write, so that asocket_close() cannot
+       block */
+    if (pipe(abort_fd))
+        return NULL;
+    flags = fcntl(abort_fd[1], F_GETFL);
+    if (flags == -1)
+        return NULL;
+    if (fcntl(abort_fd[1], F_SETFL, flags | O_NONBLOCK))
+        return NULL;
+
+    s = malloc(sizeof(struct asocket));
+    if (!s)
+        return NULL;
+
+    s->fd = fd;
+    s->abort_fd[0] = abort_fd[0];
+    s->abort_fd[1] = abort_fd[1];
+
+    return s;
+}
+
+int asocket_connect(struct asocket *s, const struct sockaddr *addr,
+        socklen_t addrlen, int timeout) {
+
+    int ret;
+
+    do {
+        ret = connect(s->fd, addr, addrlen);
+    } while (ret && errno == EINTR);
+
+    if (ret && errno == EINPROGRESS) {
+        /* ready to poll() */
+        socklen_t retlen;
+        struct pollfd pfd[2];
+
+        pfd[0].fd = s->fd;
+        pfd[0].events = POLLOUT;
+        pfd[0].revents = 0;
+        pfd[1].fd = s->abort_fd[0];
+        pfd[1].events = POLLIN;
+        pfd[1].revents = 0;
+
+        do {
+            ret = poll(pfd, 2, timeout);
+        } while (ret < 0 && errno == EINTR);
+
+        if (ret < 0)
+            return -1;
+        else if (ret == 0) {
+            /* timeout */
+            errno = ETIMEDOUT;
+            return -1;
+        }
+
+        if (pfd[1].revents) {
+            /* abort due to asocket_abort() */
+            errno = ECANCELED;
+            return -1;
+        }
+
+        if (pfd[0].revents) {
+            if (pfd[0].revents & POLLOUT) {
+                /* connect call complete, read return code */
+                retlen = sizeof(ret);
+                if (getsockopt(s->fd, SOL_SOCKET, SO_ERROR, &ret, &retlen))
+                    return -1;
+                /* got connect() return code */
+                if (ret) {
+                    errno = ret;
+                }
+            } else {
+                /* some error event on this fd */
+                errno = ECONNABORTED;
+                return -1;
+            }
+        }
+    }
+
+    return ret;
+}
+
+int asocket_accept(struct asocket *s, struct sockaddr *addr,
+        socklen_t *addrlen, int timeout) {
+
+    int ret;
+    struct pollfd pfd[2];
+
+    pfd[0].fd = s->fd;
+    pfd[0].events = POLLIN;
+    pfd[0].revents = 0;
+    pfd[1].fd = s->abort_fd[0];
+    pfd[1].events = POLLIN;
+    pfd[1].revents = 0;
+
+    do {
+        ret = poll(pfd, 2, timeout);
+    } while (ret < 0 && errno == EINTR);
+
+    if (ret < 0)
+        return -1;
+    else if (ret == 0) {
+        /* timeout */
+        errno = ETIMEDOUT;
+        return -1;
+    }
+
+    if (pfd[1].revents) {
+        /* abort due to asocket_abort() */
+        errno = ECANCELED;
+        return -1;
+    }
+
+    if (pfd[0].revents) {
+        if (pfd[0].revents & POLLIN) {
+            /* ready to accept() without blocking */
+            do {
+                ret = accept(s->fd, addr, addrlen);
+            } while (ret < 0 && errno == EINTR);
+        } else {
+            /* some error event on this fd */
+            errno = ECONNABORTED;
+            return -1;
+        }
+    }
+
+    return ret;
+}
+
+int asocket_read(struct asocket *s, void *buf, size_t count, int timeout) {
+    int ret;
+    struct pollfd pfd[2];
+
+    pfd[0].fd = s->fd;
+    pfd[0].events = POLLIN;
+    pfd[0].revents = 0;
+    pfd[1].fd = s->abort_fd[0];
+    pfd[1].events = POLLIN;
+    pfd[1].revents = 0;
+
+    do {
+        ret = poll(pfd, 2, timeout);
+    } while (ret < 0 && errno == EINTR);
+
+    if (ret < 0)
+        return -1;
+    else if (ret == 0) {
+        /* timeout */
+        errno = ETIMEDOUT;
+        return -1;
+    }
+
+    if (pfd[1].revents) {
+        /* abort due to asocket_abort() */
+        errno = ECANCELED;
+        return -1;
+    }
+
+    if (pfd[0].revents) {
+        if (pfd[0].revents & POLLIN) {
+            /* ready to read() without blocking */
+            do {
+                ret = read(s->fd, buf, count);
+            } while (ret < 0 && errno == EINTR);
+        } else {
+            /* some error event on this fd */
+            errno = ECONNABORTED;
+            return -1;
+        }
+    }
+
+    return ret;
+}
+
+int asocket_write(struct asocket *s, const void *buf, size_t count,
+        int timeout) {
+    int ret;
+    struct pollfd pfd[2];
+
+    pfd[0].fd = s->fd;
+    pfd[0].events = POLLOUT;
+    pfd[0].revents = 0;
+    pfd[1].fd = s->abort_fd[0];
+    pfd[1].events = POLLIN;
+    pfd[1].revents = 0;
+
+    do {
+        ret = poll(pfd, 2, timeout);
+    } while (ret < 0 && errno == EINTR);
+
+    if (ret < 0)
+        return -1;
+    else if (ret == 0) {
+        /* timeout */
+        errno = ETIMEDOUT;
+        return -1;
+    }
+
+    if (pfd[1].revents) {
+        /* abort due to asocket_abort() */
+        errno = ECANCELED;
+        return -1;
+    }
+
+    if (pfd[0].revents) {
+        if (pfd[0].revents & POLLIN) {
+            /* ready to write() without blocking */
+            do {
+                ret = write(s->fd, buf, count);
+            } while (ret < 0 && errno == EINTR);
+        } else {
+            /* some error event on this fd */
+            errno = ECONNABORTED;
+            return -1;
+        }
+    }
+
+    return ret;
+}
+
+void asocket_abort(struct asocket *s) {
+    int ret;
+    char buf = 0;
+
+    /* Prevent further use of fd, without yet releasing the fd */
+    shutdown(s->fd, SHUT_RDWR);
+
+    /* wake up calls blocked at poll() */
+    do {
+        ret = write(s->abort_fd[1], &buf, 1);
+    } while (ret < 0 && errno == EINTR);
+}
+
+void asocket_destroy(struct asocket *s) {
+    struct asocket s_copy = *s;
+
+    /* Clients should *not* be using these fd's after calling
+       asocket_destroy(), but in case they do, set to -1 so they cannot use a
+       stale fd */
+    s->fd = -1;
+    s->abort_fd[0] = -1;
+    s->abort_fd[1] = -1;
+
+    /* Call asocket_abort() in case there are still threads blocked on this
+       socket. Clients should not rely on this behavior - it is racy because we
+       are about to close() these sockets - clients should instead make sure
+       all threads are done with the socket before calling asocket_destory().
+     */
+    asocket_abort(&s_copy);
+
+    /* enough safety checks, close and release memory */
+    close(s_copy.abort_fd[1]);
+    close(s_copy.abort_fd[0]);
+    close(s_copy.fd);
+
+    free(s);
+}