Split event notification out of ev_epoll_linux.c
diff --git a/CMakeLists.txt b/CMakeLists.txt
index acf47e5..ca2b259 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -943,6 +943,7 @@
src/core/lib/iomgr/iomgr_uv.c
src/core/lib/iomgr/iomgr_windows.c
src/core/lib/iomgr/load_file.c
+ src/core/lib/iomgr/lockfree_event.c
src/core/lib/iomgr/network_status_tracker.c
src/core/lib/iomgr/polling_entity.c
src/core/lib/iomgr/pollset_set_uv.c
@@ -1265,6 +1266,7 @@
src/core/lib/iomgr/iomgr_uv.c
src/core/lib/iomgr/iomgr_windows.c
src/core/lib/iomgr/load_file.c
+ src/core/lib/iomgr/lockfree_event.c
src/core/lib/iomgr/network_status_tracker.c
src/core/lib/iomgr/polling_entity.c
src/core/lib/iomgr/pollset_set_uv.c
@@ -1573,6 +1575,7 @@
src/core/lib/iomgr/iomgr_uv.c
src/core/lib/iomgr/iomgr_windows.c
src/core/lib/iomgr/load_file.c
+ src/core/lib/iomgr/lockfree_event.c
src/core/lib/iomgr/network_status_tracker.c
src/core/lib/iomgr/polling_entity.c
src/core/lib/iomgr/pollset_set_uv.c
@@ -1833,6 +1836,7 @@
src/core/lib/iomgr/iomgr_uv.c
src/core/lib/iomgr/iomgr_windows.c
src/core/lib/iomgr/load_file.c
+ src/core/lib/iomgr/lockfree_event.c
src/core/lib/iomgr/network_status_tracker.c
src/core/lib/iomgr/polling_entity.c
src/core/lib/iomgr/pollset_set_uv.c
@@ -2249,6 +2253,7 @@
src/core/lib/iomgr/iomgr_uv.c
src/core/lib/iomgr/iomgr_windows.c
src/core/lib/iomgr/load_file.c
+ src/core/lib/iomgr/lockfree_event.c
src/core/lib/iomgr/network_status_tracker.c
src/core/lib/iomgr/polling_entity.c
src/core/lib/iomgr/pollset_set_uv.c
@@ -2579,6 +2584,7 @@
src/core/lib/iomgr/iomgr_uv.c
src/core/lib/iomgr/iomgr_windows.c
src/core/lib/iomgr/load_file.c
+ src/core/lib/iomgr/lockfree_event.c
src/core/lib/iomgr/network_status_tracker.c
src/core/lib/iomgr/polling_entity.c
src/core/lib/iomgr/pollset_set_uv.c
@@ -3277,6 +3283,7 @@
src/core/lib/iomgr/iomgr_uv.c
src/core/lib/iomgr/iomgr_windows.c
src/core/lib/iomgr/load_file.c
+ src/core/lib/iomgr/lockfree_event.c
src/core/lib/iomgr/network_status_tracker.c
src/core/lib/iomgr/polling_entity.c
src/core/lib/iomgr/pollset_set_uv.c
diff --git a/Makefile b/Makefile
index 5ad0557..1eeae60 100644
--- a/Makefile
+++ b/Makefile
@@ -2845,6 +2845,7 @@
src/core/lib/iomgr/iomgr_uv.c \
src/core/lib/iomgr/iomgr_windows.c \
src/core/lib/iomgr/load_file.c \
+ src/core/lib/iomgr/lockfree_event.c \
src/core/lib/iomgr/network_status_tracker.c \
src/core/lib/iomgr/polling_entity.c \
src/core/lib/iomgr/pollset_set_uv.c \
@@ -3165,6 +3166,7 @@
src/core/lib/iomgr/iomgr_uv.c \
src/core/lib/iomgr/iomgr_windows.c \
src/core/lib/iomgr/load_file.c \
+ src/core/lib/iomgr/lockfree_event.c \
src/core/lib/iomgr/network_status_tracker.c \
src/core/lib/iomgr/polling_entity.c \
src/core/lib/iomgr/pollset_set_uv.c \
@@ -3472,6 +3474,7 @@
src/core/lib/iomgr/iomgr_uv.c \
src/core/lib/iomgr/iomgr_windows.c \
src/core/lib/iomgr/load_file.c \
+ src/core/lib/iomgr/lockfree_event.c \
src/core/lib/iomgr/network_status_tracker.c \
src/core/lib/iomgr/polling_entity.c \
src/core/lib/iomgr/pollset_set_uv.c \
@@ -3704,6 +3707,7 @@
src/core/lib/iomgr/iomgr_uv.c \
src/core/lib/iomgr/iomgr_windows.c \
src/core/lib/iomgr/load_file.c \
+ src/core/lib/iomgr/lockfree_event.c \
src/core/lib/iomgr/network_status_tracker.c \
src/core/lib/iomgr/polling_entity.c \
src/core/lib/iomgr/pollset_set_uv.c \
@@ -4097,6 +4101,7 @@
src/core/lib/iomgr/iomgr_uv.c \
src/core/lib/iomgr/iomgr_windows.c \
src/core/lib/iomgr/load_file.c \
+ src/core/lib/iomgr/lockfree_event.c \
src/core/lib/iomgr/network_status_tracker.c \
src/core/lib/iomgr/polling_entity.c \
src/core/lib/iomgr/pollset_set_uv.c \
@@ -4435,6 +4440,7 @@
src/core/lib/iomgr/iomgr_uv.c \
src/core/lib/iomgr/iomgr_windows.c \
src/core/lib/iomgr/load_file.c \
+ src/core/lib/iomgr/lockfree_event.c \
src/core/lib/iomgr/network_status_tracker.c \
src/core/lib/iomgr/polling_entity.c \
src/core/lib/iomgr/pollset_set_uv.c \
@@ -5125,6 +5131,7 @@
src/core/lib/iomgr/iomgr_uv.c \
src/core/lib/iomgr/iomgr_windows.c \
src/core/lib/iomgr/load_file.c \
+ src/core/lib/iomgr/lockfree_event.c \
src/core/lib/iomgr/network_status_tracker.c \
src/core/lib/iomgr/polling_entity.c \
src/core/lib/iomgr/pollset_set_uv.c \
diff --git a/binding.gyp b/binding.gyp
index 3444fa5..3df6d0a 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -685,6 +685,7 @@
'src/core/lib/iomgr/iomgr_uv.c',
'src/core/lib/iomgr/iomgr_windows.c',
'src/core/lib/iomgr/load_file.c',
+ 'src/core/lib/iomgr/lockfree_event.c',
'src/core/lib/iomgr/network_status_tracker.c',
'src/core/lib/iomgr/polling_entity.c',
'src/core/lib/iomgr/pollset_set_uv.c',
diff --git a/build.yaml b/build.yaml
index c294fc9..c8098c5 100644
--- a/build.yaml
+++ b/build.yaml
@@ -208,6 +208,7 @@
- src/core/lib/iomgr/iomgr_internal.h
- src/core/lib/iomgr/iomgr_posix.h
- src/core/lib/iomgr/load_file.h
+ - src/core/lib/iomgr/lockfree_event.h
- src/core/lib/iomgr/network_status_tracker.h
- src/core/lib/iomgr/polling_entity.h
- src/core/lib/iomgr/pollset.h
@@ -320,6 +321,7 @@
- src/core/lib/iomgr/iomgr_uv.c
- src/core/lib/iomgr/iomgr_windows.c
- src/core/lib/iomgr/load_file.c
+ - src/core/lib/iomgr/lockfree_event.c
- src/core/lib/iomgr/network_status_tracker.c
- src/core/lib/iomgr/polling_entity.c
- src/core/lib/iomgr/pollset_set_uv.c
diff --git a/config.m4 b/config.m4
index 2846781..9470e43 100644
--- a/config.m4
+++ b/config.m4
@@ -119,6 +119,7 @@
src/core/lib/iomgr/iomgr_uv.c \
src/core/lib/iomgr/iomgr_windows.c \
src/core/lib/iomgr/load_file.c \
+ src/core/lib/iomgr/lockfree_event.c \
src/core/lib/iomgr/network_status_tracker.c \
src/core/lib/iomgr/polling_entity.c \
src/core/lib/iomgr/pollset_set_uv.c \
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index 83c19af..2e26018 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -290,6 +290,7 @@
'src/core/lib/iomgr/iomgr_internal.h',
'src/core/lib/iomgr/iomgr_posix.h',
'src/core/lib/iomgr/load_file.h',
+ 'src/core/lib/iomgr/lockfree_event.h',
'src/core/lib/iomgr/network_status_tracker.h',
'src/core/lib/iomgr/polling_entity.h',
'src/core/lib/iomgr/pollset.h',
@@ -494,6 +495,7 @@
'src/core/lib/iomgr/iomgr_uv.c',
'src/core/lib/iomgr/iomgr_windows.c',
'src/core/lib/iomgr/load_file.c',
+ 'src/core/lib/iomgr/lockfree_event.c',
'src/core/lib/iomgr/network_status_tracker.c',
'src/core/lib/iomgr/polling_entity.c',
'src/core/lib/iomgr/pollset_set_uv.c',
@@ -740,6 +742,7 @@
'src/core/lib/iomgr/iomgr_internal.h',
'src/core/lib/iomgr/iomgr_posix.h',
'src/core/lib/iomgr/load_file.h',
+ 'src/core/lib/iomgr/lockfree_event.h',
'src/core/lib/iomgr/network_status_tracker.h',
'src/core/lib/iomgr/polling_entity.h',
'src/core/lib/iomgr/pollset.h',
diff --git a/grpc.gemspec b/grpc.gemspec
index a3a5870..1165a91 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -206,6 +206,7 @@
s.files += %w( src/core/lib/iomgr/iomgr_internal.h )
s.files += %w( src/core/lib/iomgr/iomgr_posix.h )
s.files += %w( src/core/lib/iomgr/load_file.h )
+ s.files += %w( src/core/lib/iomgr/lockfree_event.h )
s.files += %w( src/core/lib/iomgr/network_status_tracker.h )
s.files += %w( src/core/lib/iomgr/polling_entity.h )
s.files += %w( src/core/lib/iomgr/pollset.h )
@@ -410,6 +411,7 @@
s.files += %w( src/core/lib/iomgr/iomgr_uv.c )
s.files += %w( src/core/lib/iomgr/iomgr_windows.c )
s.files += %w( src/core/lib/iomgr/load_file.c )
+ s.files += %w( src/core/lib/iomgr/lockfree_event.c )
s.files += %w( src/core/lib/iomgr/network_status_tracker.c )
s.files += %w( src/core/lib/iomgr/polling_entity.c )
s.files += %w( src/core/lib/iomgr/pollset_set_uv.c )
diff --git a/package.xml b/package.xml
index 6957ecc..c6b86a6 100644
--- a/package.xml
+++ b/package.xml
@@ -215,6 +215,7 @@
<file baseinstalldir="/" name="src/core/lib/iomgr/iomgr_internal.h" role="src" />
<file baseinstalldir="/" name="src/core/lib/iomgr/iomgr_posix.h" role="src" />
<file baseinstalldir="/" name="src/core/lib/iomgr/load_file.h" role="src" />
+ <file baseinstalldir="/" name="src/core/lib/iomgr/lockfree_event.h" role="src" />
<file baseinstalldir="/" name="src/core/lib/iomgr/network_status_tracker.h" role="src" />
<file baseinstalldir="/" name="src/core/lib/iomgr/polling_entity.h" role="src" />
<file baseinstalldir="/" name="src/core/lib/iomgr/pollset.h" role="src" />
@@ -419,6 +420,7 @@
<file baseinstalldir="/" name="src/core/lib/iomgr/iomgr_uv.c" role="src" />
<file baseinstalldir="/" name="src/core/lib/iomgr/iomgr_windows.c" role="src" />
<file baseinstalldir="/" name="src/core/lib/iomgr/load_file.c" role="src" />
+ <file baseinstalldir="/" name="src/core/lib/iomgr/lockfree_event.c" role="src" />
<file baseinstalldir="/" name="src/core/lib/iomgr/network_status_tracker.c" role="src" />
<file baseinstalldir="/" name="src/core/lib/iomgr/polling_entity.c" role="src" />
<file baseinstalldir="/" name="src/core/lib/iomgr/pollset_set_uv.c" role="src" />
diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c
index e5cf54f..a7105a6 100644
--- a/src/core/lib/iomgr/ev_epoll_linux.c
+++ b/src/core/lib/iomgr/ev_epoll_linux.c
@@ -56,6 +56,7 @@
#include "src/core/lib/iomgr/ev_posix.h"
#include "src/core/lib/iomgr/iomgr_internal.h"
+#include "src/core/lib/iomgr/lockfree_event.h"
#include "src/core/lib/iomgr/timer.h"
#include "src/core/lib/iomgr/wakeup_fd_posix.h"
#include "src/core/lib/iomgr/workqueue.h"
@@ -141,52 +142,11 @@
Ref/Unref by two to avoid altering the orphaned bit */
gpr_atm refst;
- /* Internally stores data of type (grpc_error *). If the FD is shutdown, this
- contains reason for shutdown (i.e a pointer to grpc_error) ORed with
- FD_SHUTDOWN_BIT. Since address allocations are word-aligned, the lower bit
- of (grpc_error *) addresses is guaranteed to be zero. Even if the
- (grpc_error *), is of special types like GRPC_ERROR_NONE, GRPC_ERROR_OOM
- etc, the lower bit is guaranteed to be zero.
-
- Once an fd is shutdown, any pending or future read/write closures on the
- fd should fail */
- gpr_atm shutdown_error;
-
/* The fd is either closed or we relinquished control of it. In either
cases, this indicates that the 'fd' on this structure is no longer
valid */
bool orphaned;
- /* Closures to call when the fd is readable or writable respectively. These
- fields contain one of the following values:
- CLOSURE_READY : The fd has an I/O event of interest but there is no
- closure yet to execute
-
- CLOSURE_NOT_READY : The fd has no I/O event of interest
-
- closure ptr : The closure to be executed when the fd has an I/O
- event of interest
-
- shutdown_error | FD_SHUTDOWN_BIT :
- 'shutdown_error' field ORed with FD_SHUTDOWN_BIT.
- This indicates that the fd is shutdown. Since all
- memory allocations are word-aligned, the lower two
- bits of the shutdown_error pointer are always 0. So
- it is safe to OR these with FD_SHUTDOWN_BIT
-
- Valid state transitions:
-
- <closure ptr> <-----3------ CLOSURE_NOT_READY ----1----> CLOSURE_READY
- | | ^ | ^ | |
- | | | | | | |
- | +--------------4----------+ 6 +---------2---------------+ |
- | | |
- | v |
- +-----5-------> [shutdown_error | FD_SHUTDOWN_BIT] <----7---------+
-
- For 1, 4 : See set_ready() function
- For 2, 3 : See notify_on() function
- For 5,6,7: See set_shutdown() function */
gpr_atm read_closure;
gpr_atm write_closure;
@@ -218,11 +178,6 @@
static void fd_global_init(void);
static void fd_global_shutdown(void);
-#define CLOSURE_NOT_READY ((gpr_atm)0)
-#define CLOSURE_READY ((gpr_atm)2)
-
-#define FD_SHUTDOWN_BIT 1
-
/*******************************************************************************
* Polling island Declarations
*/
@@ -949,10 +904,8 @@
fd_freelist = fd;
grpc_iomgr_unregister_object(&fd->iomgr_object);
- grpc_error *err = (grpc_error *)gpr_atm_acq_load(&fd->shutdown_error);
- /* Clear the least significant bit if it set (in case fd was shutdown) */
- err = (grpc_error *)((intptr_t)err & ~FD_SHUTDOWN_BIT);
- GRPC_ERROR_UNREF(err);
+ grpc_lfev_destroy(&fd->read_closure);
+ grpc_lfev_destroy(&fd->write_closure);
gpr_mu_unlock(&fd_freelist_mu);
} else {
@@ -1018,8 +971,8 @@
new_fd->fd = fd;
gpr_atm_no_barrier_store(&new_fd->shutdown_error, (gpr_atm)GRPC_ERROR_NONE);
new_fd->orphaned = false;
- gpr_atm_no_barrier_store(&new_fd->read_closure, CLOSURE_NOT_READY);
- gpr_atm_no_barrier_store(&new_fd->write_closure, CLOSURE_NOT_READY);
+ grpc_lfev_init(&new_fd->read_closure);
+ grpc_lfev_init(&new_fd->write_closure);
gpr_atm_no_barrier_store(&new_fd->read_notifier_pollset, (gpr_atm)NULL);
new_fd->freelist_next = NULL;
@@ -1105,153 +1058,6 @@
GRPC_ERROR_UNREF(error);
}
-static void notify_on(grpc_exec_ctx *exec_ctx, grpc_fd *fd, gpr_atm *state,
- grpc_closure *closure) {
- while (true) {
- gpr_atm curr = gpr_atm_no_barrier_load(state);
- switch (curr) {
- case CLOSURE_NOT_READY: {
- /* CLOSURE_NOT_READY -> <closure>.
-
- We're guaranteed by API that there's an acquire barrier before here,
- so there's no need to double-dip and this can be a release-only.
-
- The release itself pairs with the acquire half of a set_ready full
- barrier. */
- if (gpr_atm_rel_cas(state, CLOSURE_NOT_READY, (gpr_atm)closure)) {
- return; /* Successful. Return */
- }
-
- break; /* retry */
- }
-
- case CLOSURE_READY: {
- /* Change the state to CLOSURE_NOT_READY. Schedule the closure if
- successful. If not, the state most likely transitioned to shutdown.
- We should retry.
-
- This can be a no-barrier cas since the state is being transitioned to
- CLOSURE_NOT_READY; set_ready and set_shutdown do not schedule any
- closure when transitioning out of CLOSURE_NO_READY state (i.e there
- is no other code that needs to 'happen-after' this) */
- if (gpr_atm_no_barrier_cas(state, CLOSURE_READY, CLOSURE_NOT_READY)) {
- grpc_closure_sched(exec_ctx, closure, GRPC_ERROR_NONE);
- return; /* Successful. Return */
- }
-
- break; /* retry */
- }
-
- default: {
- /* 'curr' is either a closure or the fd is shutdown(in which case 'curr'
- contains a pointer to the shutdown-error). If the fd is shutdown,
- schedule the closure with the shutdown error */
- if ((curr & FD_SHUTDOWN_BIT) > 0) {
- grpc_error *shutdown_err = (grpc_error *)(curr & ~FD_SHUTDOWN_BIT);
- grpc_closure_sched(exec_ctx, closure,
- GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
- "FD Shutdown", &shutdown_err, 1));
- return;
- }
-
- /* There is already a closure!. This indicates a bug in the code */
- gpr_log(GPR_ERROR,
- "notify_on called with a previous callback still pending");
- abort();
- }
- }
- }
-
- GPR_UNREACHABLE_CODE(return );
-}
-
-static void set_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd, gpr_atm *state,
- grpc_error *shutdown_err) {
- gpr_atm new_state = (gpr_atm)shutdown_err | FD_SHUTDOWN_BIT;
-
- while (true) {
- gpr_atm curr = gpr_atm_no_barrier_load(state);
- switch (curr) {
- case CLOSURE_READY:
- case CLOSURE_NOT_READY:
- /* Need a full barrier here so that the initial load in notify_on
- doesn't need a barrier */
- if (gpr_atm_full_cas(state, curr, new_state)) {
- return; /* early out */
- }
- break; /* retry */
-
- default: {
- /* 'curr' is either a closure or the fd is already shutdown */
-
- /* If fd is already shutdown, we are done */
- if ((curr & FD_SHUTDOWN_BIT) > 0) {
- return;
- }
-
- /* Fd is not shutdown. Schedule the closure and move the state to
- shutdown state.
- Needs an acquire to pair with setting the closure (and get a
- happens-after on that edge), and a release to pair with anything
- loading the shutdown state. */
- if (gpr_atm_full_cas(state, curr, new_state)) {
- grpc_closure_sched(exec_ctx, (grpc_closure *)curr,
- GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
- "FD Shutdown", &shutdown_err, 1));
- return;
- }
-
- /* 'curr' was a closure but now changed to a different state. We will
- have to retry */
- break;
- }
- }
- }
-
- GPR_UNREACHABLE_CODE(return );
-}
-
-static void set_ready(grpc_exec_ctx *exec_ctx, grpc_fd *fd, gpr_atm *state) {
- while (true) {
- gpr_atm curr = gpr_atm_no_barrier_load(state);
-
- switch (curr) {
- case CLOSURE_READY: {
- /* Already ready. We are done here */
- return;
- }
-
- case CLOSURE_NOT_READY: {
- /* No barrier required as we're transitioning to a state that does not
- involve a closure */
- if (gpr_atm_no_barrier_cas(state, CLOSURE_NOT_READY, CLOSURE_READY)) {
- return; /* early out */
- }
- break; /* retry */
- }
-
- default: {
- /* 'curr' is either a closure or the fd is shutdown */
- if ((curr & FD_SHUTDOWN_BIT) > 0) {
- /* The fd is shutdown. Do nothing */
- return;
- }
- /* Full cas: acquire pairs with this cas' release in the event of a
- spurious set_ready; release pairs with this or the acquire in
- notify_on (or set_shutdown) */
- else if (gpr_atm_full_cas(state, curr, CLOSURE_NOT_READY)) {
- grpc_closure_sched(exec_ctx, (grpc_closure *)curr, GRPC_ERROR_NONE);
- return;
- }
- /* else the state changed again (only possible by either a racing
- set_ready or set_shutdown functions. In both these cases, the closure
- would have been scheduled for execution. So we are done here */
- return;
- }
- }
- }
-}
-
static grpc_pollset *fd_get_read_notifier_pollset(grpc_exec_ctx *exec_ctx,
grpc_fd *fd) {
gpr_atm notifier = gpr_atm_acq_load(&fd->read_notifier_pollset);
@@ -1259,23 +1065,16 @@
}
static bool fd_is_shutdown(grpc_fd *fd) {
- grpc_error *err = (grpc_error *)gpr_atm_acq_load(&fd->shutdown_error);
- return (((intptr_t)err & FD_SHUTDOWN_BIT) > 0);
+ return grpc_lfev_is_shutdown(&fd->read_closure);
}
/* Might be called multiple times */
static void fd_shutdown(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_error *why) {
- /* Store the shutdown error ORed with FD_SHUTDOWN_BIT in fd->shutdown_error */
- if (gpr_atm_rel_cas(&fd->shutdown_error, (gpr_atm)GRPC_ERROR_NONE,
- (gpr_atm)why | FD_SHUTDOWN_BIT)) {
+ if (grpc_lfev_set_shutdown(&fd->read_closure, GRPC_ERROR_REF(why))) {
shutdown(fd->fd, SHUT_RDWR);
-
- set_shutdown(exec_ctx, fd, &fd->read_closure, why);
- set_shutdown(exec_ctx, fd, &fd->write_closure, why);
- } else {
- /* Shutdown already called */
- GRPC_ERROR_UNREF(why);
+ grpc_lfev_set_shutdown(&fd->write_closure, GRPC_ERROR_REF(why));
}
+ GRPC_ERROR_UNREF(why);
}
static void fd_notify_on_read(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
diff --git a/src/core/lib/iomgr/lockfree_event.c b/src/core/lib/iomgr/lockfree_event.c
new file mode 100644
index 0000000..a974298
--- /dev/null
+++ b/src/core/lib/iomgr/lockfree_event.c
@@ -0,0 +1,224 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/lockfree_event.h"
+
+#include <grpc/support/log.h>
+
+/* 'state' holds the to call when the fd is readable or writable respectively.
+ It can contain one of the following values:
+ CLOSURE_READY : The fd has an I/O event of interest but there is no
+ closure yet to execute
+
+ CLOSURE_NOT_READY : The fd has no I/O event of interest
+
+ closure ptr : The closure to be executed when the fd has an I/O
+ event of interest
+
+ shutdown_error | FD_SHUTDOWN_BIT :
+ 'shutdown_error' field ORed with FD_SHUTDOWN_BIT.
+ This indicates that the fd is shutdown. Since all
+ memory allocations are word-aligned, the lower two
+ bits of the shutdown_error pointer are always 0. So
+ it is safe to OR these with FD_SHUTDOWN_BIT
+
+ Valid state transitions:
+
+ <closure ptr> <-----3------ CLOSURE_NOT_READY ----1----> CLOSURE_READY
+ | | ^ | ^ | |
+ | | | | | | |
+ | +--------------4----------+ 6 +---------2---------------+ |
+ | | |
+ | v |
+ +-----5-------> [shutdown_error | FD_SHUTDOWN_BIT] <----7---------+
+
+ For 1, 4 : See grpc_lfev_set_ready() function
+ For 2, 3 : See grpc_lfev_notify_on() function
+ For 5,6,7: See grpc_lfev_set_shutdown() function */
+
+#define CLOSURE_NOT_READY ((gpr_atm)0)
+#define CLOSURE_READY ((gpr_atm)2)
+
+#define FD_SHUTDOWN_BIT 1
+
+void grpc_lfev_init(gpr_atm *state) {
+ gpr_atm_no_barrier_store(state, CLOSURE_NOT_READY);
+}
+
+void grpc_lfev_notify_on(grpc_exec_ctx *exec_ctx, gpr_atm *state,
+ grpc_closure *closure) {
+ while (true) {
+ gpr_atm curr = gpr_atm_no_barrier_load(state);
+ switch (curr) {
+ case CLOSURE_NOT_READY: {
+ /* CLOSURE_NOT_READY -> <closure>.
+
+ We're guaranteed by API that there's an acquire barrier before here,
+ so there's no need to double-dip and this can be a release-only.
+
+ The release itself pairs with the acquire half of a set_ready full
+ barrier. */
+ if (gpr_atm_rel_cas(state, CLOSURE_NOT_READY, (gpr_atm)closure)) {
+ return; /* Successful. Return */
+ }
+
+ break; /* retry */
+ }
+
+ case CLOSURE_READY: {
+ /* Change the state to CLOSURE_NOT_READY. Schedule the closure if
+ successful. If not, the state most likely transitioned to shutdown.
+ We should retry.
+
+ This can be a no-barrier cas since the state is being transitioned to
+ CLOSURE_NOT_READY; set_ready and set_shutdown do not schedule any
+ closure when transitioning out of CLOSURE_NO_READY state (i.e there
+ is no other code that needs to 'happen-after' this) */
+ if (gpr_atm_no_barrier_cas(state, CLOSURE_READY, CLOSURE_NOT_READY)) {
+ grpc_closure_sched(exec_ctx, closure, GRPC_ERROR_NONE);
+ return; /* Successful. Return */
+ }
+
+ break; /* retry */
+ }
+
+ default: {
+ /* 'curr' is either a closure or the fd is shutdown(in which case 'curr'
+ contains a pointer to the shutdown-error). If the fd is shutdown,
+ schedule the closure with the shutdown error */
+ if ((curr & FD_SHUTDOWN_BIT) > 0) {
+ grpc_error *shutdown_err = (grpc_error *)(curr & ~FD_SHUTDOWN_BIT);
+ grpc_closure_sched(exec_ctx, closure,
+ GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+ "FD Shutdown", &shutdown_err, 1));
+ return;
+ }
+
+ /* There is already a closure!. This indicates a bug in the code */
+ gpr_log(GPR_ERROR,
+ "notify_on called with a previous callback still pending");
+ abort();
+ }
+ }
+ }
+
+ GPR_UNREACHABLE_CODE(return );
+}
+
+bool grpc_lfev_set_shutdown(grpc_exec_ctx *exec_ctx, gpr_atm *state,
+ grpc_error *shutdown_err) {
+ gpr_atm new_state = (gpr_atm)shutdown_err | FD_SHUTDOWN_BIT;
+
+ while (true) {
+ gpr_atm curr = gpr_atm_no_barrier_load(state);
+ switch (curr) {
+ case CLOSURE_READY:
+ case CLOSURE_NOT_READY:
+ /* Need a full barrier here so that the initial load in notify_on
+ doesn't need a barrier */
+ if (gpr_atm_full_cas(state, curr, new_state)) {
+ return true; /* early out */
+ }
+ break; /* retry */
+
+ default: {
+ /* 'curr' is either a closure or the fd is already shutdown */
+
+ /* If fd is already shutdown, we are done */
+ if ((curr & FD_SHUTDOWN_BIT) > 0) {
+ GRPC_ERROR_UNREF(shutdown_err);
+ return false;
+ }
+
+ /* Fd is not shutdown. Schedule the closure and move the state to
+ shutdown state.
+ Needs an acquire to pair with setting the closure (and get a
+ happens-after on that edge), and a release to pair with anything
+ loading the shutdown state. */
+ if (gpr_atm_full_cas(state, curr, new_state)) {
+ grpc_closure_sched(exec_ctx, (grpc_closure *)curr,
+ GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+ "FD Shutdown", &shutdown_err, 1));
+ return true;
+ }
+
+ /* 'curr' was a closure but now changed to a different state. We will
+ have to retry */
+ break;
+ }
+ }
+ }
+
+ GPR_UNREACHABLE_CODE(return false);
+}
+
+void grpc_lfev_set_ready(grpc_exec_ctx *exec_ctx, gpr_atm *state) {
+ while (true) {
+ gpr_atm curr = gpr_atm_no_barrier_load(state);
+
+ switch (curr) {
+ case CLOSURE_READY: {
+ /* Already ready. We are done here */
+ return;
+ }
+
+ case CLOSURE_NOT_READY: {
+ /* No barrier required as we're transitioning to a state that does not
+ involve a closure */
+ if (gpr_atm_no_barrier_cas(state, CLOSURE_NOT_READY, CLOSURE_READY)) {
+ return; /* early out */
+ }
+ break; /* retry */
+ }
+
+ default: {
+ /* 'curr' is either a closure or the fd is shutdown */
+ if ((curr & FD_SHUTDOWN_BIT) > 0) {
+ /* The fd is shutdown. Do nothing */
+ return;
+ }
+ /* Full cas: acquire pairs with this cas' release in the event of a
+ spurious set_ready; release pairs with this or the acquire in
+ notify_on (or set_shutdown) */
+ else if (gpr_atm_full_cas(state, curr, CLOSURE_NOT_READY)) {
+ grpc_closure_sched(exec_ctx, (grpc_closure *)curr, GRPC_ERROR_NONE);
+ return;
+ }
+ /* else the state changed again (only possible by either a racing
+ set_ready or set_shutdown functions. In both these cases, the closure
+ would have been scheduled for execution. So we are done here */
+ return;
+ }
+ }
+ }
+}
diff --git a/src/core/lib/iomgr/lockfree_event.h b/src/core/lib/iomgr/lockfree_event.h
new file mode 100644
index 0000000..32eb755
--- /dev/null
+++ b/src/core/lib/iomgr/lockfree_event.h
@@ -0,0 +1,52 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_LOCKFREE_EVENT_H
+#define GRPC_CORE_LIB_IOMGR_LOCKFREE_EVENT_H
+
+/* Lock free event notification for file descriptors */
+
+#include "src/core/lib/iomgr/exec_ctx.h"
+
+void grpc_lfev_init(gpr_atm *state);
+void grpc_lfev_destroy(gpr_atm *state);
+bool grpc_lfev_is_shutdown(gpr_atm *state);
+
+void grpc_lfev_notify_on(grpc_exec_ctx *exec_ctx, gpr_atm *state,
+ grpc_closure *closure);
+/* Returns true on first successful shutdown */
+bool grpc_lfev_set_shutdown(grpc_exec_ctx *exec_ctx, gpr_atm *state,
+ grpc_error *shutdown_err);
+void grpc_lfev_set_ready(grpc_exec_ctx *exec_ctx, gpr_atm *state);
+
+#endif /* GRPC_CORE_LIB_IOMGR_LOCKFREE_EVENT_H */
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 3bcbe66..0d0a5fb 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -113,6 +113,7 @@
'src/core/lib/iomgr/iomgr_uv.c',
'src/core/lib/iomgr/iomgr_windows.c',
'src/core/lib/iomgr/load_file.c',
+ 'src/core/lib/iomgr/lockfree_event.c',
'src/core/lib/iomgr/network_status_tracker.c',
'src/core/lib/iomgr/polling_entity.c',
'src/core/lib/iomgr/pollset_set_uv.c',
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index 209d544..afab2296 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -971,6 +971,8 @@
src/core/lib/iomgr/iomgr_windows.c \
src/core/lib/iomgr/load_file.c \
src/core/lib/iomgr/load_file.h \
+src/core/lib/iomgr/lockfree_event.c \
+src/core/lib/iomgr/lockfree_event.h \
src/core/lib/iomgr/network_status_tracker.c \
src/core/lib/iomgr/network_status_tracker.h \
src/core/lib/iomgr/polling_entity.c \
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index 6903a0e..ee1fd1b 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -1092,6 +1092,8 @@
src/core/lib/iomgr/iomgr_windows.c \
src/core/lib/iomgr/load_file.c \
src/core/lib/iomgr/load_file.h \
+src/core/lib/iomgr/lockfree_event.c \
+src/core/lib/iomgr/lockfree_event.h \
src/core/lib/iomgr/network_status_tracker.c \
src/core/lib/iomgr/network_status_tracker.h \
src/core/lib/iomgr/polling_entity.c \
diff --git a/tools/run_tests/generated/sources_and_headers.json b/tools/run_tests/generated/sources_and_headers.json
index ae5120d..fa62d0a 100644
--- a/tools/run_tests/generated/sources_and_headers.json
+++ b/tools/run_tests/generated/sources_and_headers.json
@@ -7549,6 +7549,7 @@
"src/core/lib/iomgr/iomgr_internal.h",
"src/core/lib/iomgr/iomgr_posix.h",
"src/core/lib/iomgr/load_file.h",
+ "src/core/lib/iomgr/lockfree_event.h",
"src/core/lib/iomgr/network_status_tracker.h",
"src/core/lib/iomgr/polling_entity.h",
"src/core/lib/iomgr/pollset.h",
@@ -7710,6 +7711,8 @@
"src/core/lib/iomgr/iomgr_windows.c",
"src/core/lib/iomgr/load_file.c",
"src/core/lib/iomgr/load_file.h",
+ "src/core/lib/iomgr/lockfree_event.c",
+ "src/core/lib/iomgr/lockfree_event.h",
"src/core/lib/iomgr/network_status_tracker.c",
"src/core/lib/iomgr/network_status_tracker.h",
"src/core/lib/iomgr/polling_entity.c",
diff --git a/vsprojects/vcxproj/grpc++/grpc++.vcxproj b/vsprojects/vcxproj/grpc++/grpc++.vcxproj
index caa22a0..cae44c5 100644
--- a/vsprojects/vcxproj/grpc++/grpc++.vcxproj
+++ b/vsprojects/vcxproj/grpc++/grpc++.vcxproj
@@ -412,6 +412,7 @@
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_internal.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_posix.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.h" />
+ <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset.h" />
@@ -647,6 +648,8 @@
</ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.c">
</ClCompile>
+ <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.c">
+ </ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.c">
</ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.c">
diff --git a/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters b/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
index 6fc1c96..36da089 100644
--- a/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++/grpc++.vcxproj.filters
@@ -232,6 +232,9 @@
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.c">
<Filter>src\core\lib\iomgr</Filter>
</ClCompile>
+ <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.c">
+ <Filter>src\core\lib\iomgr</Filter>
+ </ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.c">
<Filter>src\core\lib\iomgr</Filter>
</ClCompile>
@@ -968,6 +971,9 @@
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.h">
<Filter>src\core\lib\iomgr</Filter>
</ClInclude>
+ <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.h">
+ <Filter>src\core\lib\iomgr</Filter>
+ </ClInclude>
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.h">
<Filter>src\core\lib\iomgr</Filter>
</ClInclude>
diff --git a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
index 6748181..4d28400 100644
--- a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj
@@ -406,6 +406,7 @@
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_internal.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_posix.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.h" />
+ <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset.h" />
@@ -631,6 +632,8 @@
</ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.c">
</ClCompile>
+ <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.c">
+ </ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.c">
</ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.c">
diff --git a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
index 2b9a5b1..9d64155 100644
--- a/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc++_unsecure/grpc++_unsecure.vcxproj.filters
@@ -217,6 +217,9 @@
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.c">
<Filter>src\core\lib\iomgr</Filter>
</ClCompile>
+ <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.c">
+ <Filter>src\core\lib\iomgr</Filter>
+ </ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.c">
<Filter>src\core\lib\iomgr</Filter>
</ClCompile>
@@ -935,6 +938,9 @@
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.h">
<Filter>src\core\lib\iomgr</Filter>
</ClInclude>
+ <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.h">
+ <Filter>src\core\lib\iomgr</Filter>
+ </ClInclude>
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.h">
<Filter>src\core\lib\iomgr</Filter>
</ClInclude>
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index 948af2f..dd6fdd8 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -335,6 +335,7 @@
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_internal.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_posix.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.h" />
+ <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset.h" />
@@ -578,6 +579,8 @@
</ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.c">
</ClCompile>
+ <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.c">
+ </ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.c">
</ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.c">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index d43b0e3..51c9b72 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -112,6 +112,9 @@
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.c">
<Filter>src\core\lib\iomgr</Filter>
</ClCompile>
+ <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.c">
+ <Filter>src\core\lib\iomgr</Filter>
+ </ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.c">
<Filter>src\core\lib\iomgr</Filter>
</ClCompile>
@@ -902,6 +905,9 @@
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.h">
<Filter>src\core\lib\iomgr</Filter>
</ClInclude>
+ <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.h">
+ <Filter>src\core\lib\iomgr</Filter>
+ </ClInclude>
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.h">
<Filter>src\core\lib\iomgr</Filter>
</ClInclude>
diff --git a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
index c675cda..b1db7e5 100644
--- a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
+++ b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
@@ -230,6 +230,7 @@
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_internal.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_posix.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.h" />
+ <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset.h" />
@@ -419,6 +420,8 @@
</ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.c">
</ClCompile>
+ <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.c">
+ </ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.c">
</ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.c">
diff --git a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
index c6bd2d6..a7ecbea 100644
--- a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
@@ -169,6 +169,9 @@
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.c">
<Filter>src\core\lib\iomgr</Filter>
</ClCompile>
+ <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.c">
+ <Filter>src\core\lib\iomgr</Filter>
+ </ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.c">
<Filter>src\core\lib\iomgr</Filter>
</ClCompile>
@@ -680,6 +683,9 @@
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.h">
<Filter>src\core\lib\iomgr</Filter>
</ClInclude>
+ <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.h">
+ <Filter>src\core\lib\iomgr</Filter>
+ </ClInclude>
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.h">
<Filter>src\core\lib\iomgr</Filter>
</ClInclude>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index 8799359..8614b11 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -325,6 +325,7 @@
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_internal.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\iomgr_posix.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.h" />
+ <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.h" />
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\pollset.h" />
@@ -546,6 +547,8 @@
</ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.c">
</ClCompile>
+ <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.c">
+ </ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.c">
</ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\polling_entity.c">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index cf2def4..e7aa9fb 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -115,6 +115,9 @@
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.c">
<Filter>src\core\lib\iomgr</Filter>
</ClCompile>
+ <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.c">
+ <Filter>src\core\lib\iomgr</Filter>
+ </ClCompile>
<ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.c">
<Filter>src\core\lib\iomgr</Filter>
</ClCompile>
@@ -815,6 +818,9 @@
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\load_file.h">
<Filter>src\core\lib\iomgr</Filter>
</ClInclude>
+ <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\lockfree_event.h">
+ <Filter>src\core\lib\iomgr</Filter>
+ </ClInclude>
<ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\network_status_tracker.h">
<Filter>src\core\lib\iomgr</Filter>
</ClInclude>