/* * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the Apache License 2.0 (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ #include <openssl/configuration.h> #include <openssl/e_os2.h> #include <openssl/types.h> #include <openssl/crypto.h> #include <internal/thread.h> #include <internal/thread_arch.h> #if !defined(OPENSSL_NO_DEFAULT_THREAD_POOL) static ossl_inline uint64_t _ossl_get_avail_threads(OSSL_LIB_CTX_THREADS *tdata) { /* assumes that tdata->lock is taken */ return tdata->max_threads - tdata->active_threads; } uint64_t ossl_get_avail_threads(OSSL_LIB_CTX *ctx) { uint64_t retval = 0; OSSL_LIB_CTX_THREADS *tdata = OSSL_LIB_CTX_GET_THREADS(ctx); if (tdata == NULL) return retval; ossl_crypto_mutex_lock(tdata->lock); retval = _ossl_get_avail_threads(tdata); ossl_crypto_mutex_unlock(tdata->lock); return retval; } void *ossl_crypto_thread_start(OSSL_LIB_CTX *ctx, CRYPTO_THREAD_ROUTINE start, void *data) { CRYPTO_THREAD *thread; OSSL_LIB_CTX_THREADS *tdata = OSSL_LIB_CTX_GET_THREADS(ctx); if (tdata == NULL) return NULL; ossl_crypto_mutex_lock(tdata->lock); if (tdata == NULL || tdata->max_threads == 0) { ossl_crypto_mutex_unlock(tdata->lock); return NULL; } while (_ossl_get_avail_threads(tdata) == 0) ossl_crypto_condvar_wait(tdata->cond_finished, tdata->lock); tdata->active_threads++; ossl_crypto_mutex_unlock(tdata->lock); thread = ossl_crypto_thread_native_start(start, data, 1); if (thread == NULL) { ossl_crypto_mutex_lock(tdata->lock); tdata->active_threads--; ossl_crypto_mutex_unlock(tdata->lock); goto fail; } thread->ctx = ctx; fail: return (void *) thread; } int ossl_crypto_thread_join(void *vhandle, CRYPTO_THREAD_RETVAL *retval) { CRYPTO_THREAD *handle = vhandle; OSSL_LIB_CTX_THREADS *tdata; if (vhandle == NULL) return 0; tdata = OSSL_LIB_CTX_GET_THREADS(handle->ctx); if (tdata == NULL) return 0; if (ossl_crypto_thread_native_join(handle, retval) == 0) return 0; ossl_crypto_mutex_lock(tdata->lock); tdata->active_threads--; ossl_crypto_condvar_broadcast(tdata->cond_finished); ossl_crypto_mutex_unlock(tdata->lock); return 1; } int ossl_crypto_thread_clean(void *vhandle) { CRYPTO_THREAD *handle = vhandle; return ossl_crypto_thread_native_clean(handle); } #else ossl_inline uint64_t ossl_get_avail_threads(OSSL_LIB_CTX *ctx) { return 0; } void *ossl_crypto_thread_start(OSSL_LIB_CTX *ctx, CRYPTO_THREAD_ROUTINE start, void *data) { return NULL; } int ossl_crypto_thread_join(void *vhandle, CRYPTO_THREAD_RETVAL *retval) { return 0; } int ossl_crypto_thread_clean(void *vhandle) { return 0; } #endif #if defined(OPENSSL_THREADS) void *ossl_threads_ctx_new(OSSL_LIB_CTX *ctx) { struct openssl_threads_st *t = OPENSSL_zalloc(sizeof(*t)); if (t == NULL) return NULL; t->lock = ossl_crypto_mutex_new(); t->cond_finished = ossl_crypto_condvar_new(); if (t->lock == NULL || t->cond_finished == NULL) goto fail; return t; fail: ossl_threads_ctx_free((void *)t); return NULL; } void ossl_threads_ctx_free(void *vdata) { OSSL_LIB_CTX_THREADS *t = (OSSL_LIB_CTX_THREADS *) vdata; if (t == NULL) return; ossl_crypto_mutex_free(&t->lock); ossl_crypto_condvar_free(&t->cond_finished); OPENSSL_free(t); } #endif