diff options
Diffstat (limited to 'src/core/lib')
| -rw-r--r-- | src/core/lib/iomgr/ev_epoll_linux.c | 229 | ||||
| -rw-r--r-- | src/core/lib/iomgr/lockfree_event.c | 238 | ||||
| -rw-r--r-- | src/core/lib/iomgr/lockfree_event.h | 54 | ||||
| -rw-r--r-- | src/core/lib/security/credentials/credentials.h | 2 |
4 files changed, 307 insertions, 216 deletions
diff --git a/src/core/lib/iomgr/ev_epoll_linux.c b/src/core/lib/iomgr/ev_epoll_linux.c index 1433c30f27..4a0f91391f 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 @@ struct grpc_fd { 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 In either cases, this indicates that the 'fd' on this structure is no longer valid */ bool orphaned; - /* Closures to call when the fd is readable or writable respectively.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_unref(grpc_fd *fd); 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 @@ static void unref_by(grpc_fd *fd, int n) { 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 { @@ -1016,10 +969,9 @@ static grpc_fd *fd_create(int fd, const char *name) { gpr_atm_rel_store(&new_fd->refst, (gpr_atm)1); 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 +1057,6 @@ static void fd_orphan(grpc_exec_ctx *exec_ctx, grpc_fd *fd, 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); @@ -1259,33 +1064,27 @@ static grpc_pollset *fd_get_read_notifier_pollset(grpc_exec_ctx *exec_ctx, } 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(exec_ctx, &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(exec_ctx, &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, grpc_closure *closure) { - notify_on(exec_ctx, fd, &fd->read_closure, closure); + grpc_lfev_notify_on(exec_ctx, &fd->read_closure, closure); } static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_closure *closure) { - notify_on(exec_ctx, fd, &fd->write_closure, closure); + grpc_lfev_notify_on(exec_ctx, &fd->write_closure, closure); } static grpc_workqueue *fd_get_workqueue(grpc_fd *fd) { @@ -1475,7 +1274,7 @@ static int poll_deadline_to_millis_timeout(gpr_timespec deadline, static void fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd, grpc_pollset *notifier) { - set_ready(exec_ctx, fd, &fd->read_closure); + grpc_lfev_set_ready(exec_ctx, &fd->read_closure); /* Note, it is possible that fd_become_readable might be called twice with different 'notifier's when an fd becomes readable and it is in two epoll @@ -1487,7 +1286,7 @@ static void fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd, } static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) { - set_ready(exec_ctx, fd, &fd->write_closure); + grpc_lfev_set_ready(exec_ctx, &fd->write_closure); } static void pollset_release_polling_island(grpc_exec_ctx *exec_ctx, diff --git a/src/core/lib/iomgr/lockfree_event.c b/src/core/lib/iomgr/lockfree_event.c new file mode 100644 index 0000000000..17e3bbf727 --- /dev/null +++ b/src/core/lib/iomgr/lockfree_event.c @@ -0,0 +1,238 @@ +/* + * + * 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 ((gpr_atm)1) + +void grpc_lfev_init(gpr_atm *state) { + gpr_atm_no_barrier_store(state, CLOSURE_NOT_READY); +} + +void grpc_lfev_destroy(gpr_atm *state) { + gpr_atm curr = gpr_atm_no_barrier_load(state); + if (curr & FD_SHUTDOWN_BIT) { + GRPC_ERROR_UNREF((grpc_error *)(curr & ~FD_SHUTDOWN_BIT)); + } else { + GPR_ASSERT(curr == CLOSURE_NOT_READY || curr == CLOSURE_READY); + } +} + +bool grpc_lfev_is_shutdown(gpr_atm *state) { + gpr_atm curr = gpr_atm_no_barrier_load(state); + return (curr & FD_SHUTDOWN_BIT) != 0; +} + +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 0000000000..1d9119204c --- /dev/null +++ b/src/core/lib/iomgr/lockfree_event.h @@ -0,0 +1,54 @@ +/* + * + * 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 <grpc/support/atm.h> + +#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/core/lib/security/credentials/credentials.h b/src/core/lib/security/credentials/credentials.h index 510b79552a..89b8e3c0b3 100644 --- a/src/core/lib/security/credentials/credentials.h +++ b/src/core/lib/security/credentials/credentials.h @@ -71,7 +71,7 @@ typedef enum { #define GRPC_SECURE_TOKEN_REFRESH_THRESHOLD_SECS 60 -#define GRPC_COMPUTE_ENGINE_METADATA_HOST "metadata" +#define GRPC_COMPUTE_ENGINE_METADATA_HOST "metadata.google.internal" #define GRPC_COMPUTE_ENGINE_METADATA_TOKEN_PATH \ "/computeMetadata/v1/instance/service-accounts/default/token" |